1. FINA 635: Managerial Finance
Time Value of Money Review

2. Question #1
Consider a cash flow of $100 received five years from now and an interest rate of 5%.
t=0 t
C=$100
t=5

3. Question #1: Part (a)
Consider a cash flow of $100 received five years from now and an interest rate of 5%.
Calculate the future value of this cash flow ten years from now.
𝑭 𝑽 𝒏 =𝑪× 𝟏+𝒓 𝒏
𝐹 𝑉 10 =100× =$𝟏𝟐𝟕.𝟔𝟑
t=0
C=$100
t=5
t=10
FV=?

4. Question #1: Part (b)
Consider a cash flow of $100 received five years from now and an interest rate of 5%.
Calculate the present value of this cash flow at time zero.
𝑷 𝑽 𝟎 = 𝑪 𝟏+𝒓 𝒏
𝑃 𝑉 0 = =$𝟕𝟖.𝟑𝟓
t=0
C=$100
t=5
𝑃 𝑉 0 =?

5. Question #1: Part (c)
Consider a cash flow of $100 received five years from now and an interest rate of 5%.
What will be the value of this cash flow two years from now?
𝑃 𝑉 2 = =$𝟖𝟔.𝟑𝟖
𝐹 𝑉 2 =78.35× =$𝟖𝟔.𝟑𝟖
t=0
C=$100
t=5
t=2
𝑃 𝑉 0 =$78.35
𝐹 𝑉 2 =𝑃 𝑉 2 =?

6. Question #1: Part (d) Assume interest rates of 2% and 10%
Calculate the future value of this cash flow ten years from now.
𝑭 𝑽 𝒏 =𝑪× 𝟏+𝒓 𝒏
𝑨𝒕 𝒓=𝟐%: 𝐹 𝑉 10 =100× =$𝟏𝟏𝟎.𝟒𝟏
𝑨𝒕 𝒓=𝟏𝟎%: 𝐹 𝑉 10 =100× =$𝟏𝟔𝟏.𝟎𝟓
t=0
C=$100
t=5
t=10
FV=?

7. Question #1: Part (e) Assume interest rates of 2% and 10%
Calculate the present value of this cash flow at time zero.
𝑷 𝑽 𝟎 = 𝑪 𝟏+𝒓 𝒏
𝑨𝒕 𝒓=𝟐%:𝑃 𝑉 0 = =$𝟗𝟎.𝟓𝟕
𝑨𝒕 𝒓=𝟏𝟎%:𝑃 𝑉 0 = =$𝟔𝟐.𝟎𝟗
t=0
C=$100
t=5
𝑃 𝑉 0 =?

8. Question #2: Sweet Food Inc.
A manager is considering expanding her firm “Sweet Food Inc.” and developing a new production line for ice-cream. The cost of developing the production line involves an initial investment of $2.6 million today and an additional investment at the end of the first year of $1.5 million. After thorough analysis of demand for the ice-cream, the manager was able to estimate the future revenues from ice-cream sales for the next few years. The expected revenues will be $1.3 million at the end of year 2, $1.8 million at the end of year 3 and $2.1 million at the end of year 4. No production of the ice-cream will be possible after year 4 (the equipment will become obsolete). In today’s Wall Street Journal the manager found that the interest rate was equal to 10 percent.
t=0
$1.8𝑀
t=3
t=1
t=2
t=4
−$2.6𝑀
−$1.5𝑀
$1.3𝑀
$2.1𝑀

9. Question #2: Sweet Food Inc. Part (a)
Given: r=10%
(a) What is the present value of the project’s costs?
𝑃𝑉 𝐶𝑜𝑠𝑡𝑠 = 𝐶 0 + 𝐶 𝑟 1
𝑃𝑉 𝐶𝑜𝑠𝑡𝑠 =$2.6𝑀+ $1.5𝑀 1.1
𝑷𝑽 𝑪𝒐𝒔𝒕𝒔 =$𝟑.𝟗𝟔𝑴
t=0
$1.8𝑀
t=3
−$2.6𝑀
−$1.5𝑀
t=1
$1.3𝑀
t=2
$2.1𝑀
t=4

10. Question #2: Sweet Food Inc. Part (b)
Given: r=10%
(b) What is the present value of the project’s revenues? Should the manager execute the project?
𝑃𝑉 𝑅𝑒𝑣𝑒𝑛𝑢𝑒𝑠 = 𝐶 𝑟 𝐶 𝑟 𝐶 𝑟 4
𝑃𝑉 𝑅𝑒𝑣𝑒𝑛𝑢𝑒𝑠 = $1.3𝑀 $1.8𝑀 $2.1𝑀 =$𝟑.𝟖𝟔𝑴
𝑁𝑃𝑉=𝑃𝑉 𝑅𝑒𝑣𝑒𝑛𝑢𝑒𝑠 −𝑃𝑉 𝐶𝑜𝑠𝑡𝑠 =$3.86𝑀−$3.96𝑀=−𝟎.𝟏𝑴
𝑵𝑷𝑽<𝟎. Do not execute the project.
t=0
$1.8𝑀
t=3
−$2.6𝑀
−$1.5𝑀
t=1
$1.3𝑀
t=2
$2.1𝑀
t=4

11. Question #3: Oil Pipeline Part (a)
You own an oil pipeline which will generate a $2 million cash return over the coming year. The pipeline’s operating costs are negligible, and it is expected to last for a very long time. Unfortunately, the volume of oil shipped is declining, and cash flows are expected to decline by 4 percent per year. The discount rate is 10 percent.
(a) What is the PV of the pipeline’s cash flows if its cash flows are assumed to last forever?
This is a growing perpetuity.
𝑷 𝑽 𝟎 = 𝑪 𝒓−𝒈
𝑃 𝑉 0 = $2𝑀 0.1−(−0.04) =$𝟏𝟒.𝟐𝟗𝑴
t=0
$2𝑀 1−
t=3
$2𝑀
t=1
$2𝑀(1−0.04)
t=2 …

12. Question #3: Oil Pipeline Part (b)
You own an oil pipeline which will generate a $2 million cash return over the coming year. The pipeline’s operating costs are negligible, and it is expected to last for a very long time. Unfortunately, the volume of oil shipped is declining, and cash flows are expected to decline by 4 percent per year. The discount rate is 10 percent.
(b) What is the PV of the cash flows if the pipeline is scrapped after 20 years?
This is a growing annuity.
𝑷 𝑽 𝟎 = 𝑪 𝒓−𝒈 𝟏− 𝟏+𝒈 𝟏+𝒓 𝒏
𝑃 𝑉 0 = $2𝑀 0.1−(−0.04) 1− 1− =$𝟏𝟑.𝟑𝟓𝑴 …
t=0
$2𝑀 1−
t=3
$2𝑀
t=1
$2𝑀(1−0.04)
t=2
t=20
$2𝑀 1−

13. Question #4: Foresight
Attached to this problem set is a page from Foresight from the Art Institute of Chicago (all information required to solve this problem is provided below). It describes the details of a charitable annuity agreement. Let’s focus on the figures for a one-person annuitant. For example, if a donor is 50 years old when the donation is made, the donor receives an annual annuity equal to 6.5% of the donation until the donor dies. If the donor is 60 years old when the donation is made, the annuity percentage is 6.9%. In this example, a donation of $100,000 would provide income to the 50-year old donor of $6,500 per year for life. The same donation would provide income to the 60-year old donor of $6,900 per year for life. Ignore tax effects for now.

14. Question #4: Foresight Part (A)
(a) At what life expectancy would the donation begin to be a gift from the Art Institute to the “donor”?
Donor is 50 years old
Cost of capital (r)=5%
The donation will become a gift from the institute to the donor when the current value of all annual payments is equal to the price of the annuity.
Assume you paid $1000 for the annuity.
𝑃𝑉 𝑎𝑛𝑛𝑢𝑖𝑡𝑦 = 𝐶 𝑟 1− 𝑟 𝑛
$1000= − 𝑛

15. Question #4: Foresight Part (A)
$1000= − 𝑛
𝑛 =1−1000×
1.05 𝑛 = 1 1−1000×
𝑛× log = log 1 1−1000×
𝑛= log 1 1−1000× log 1.05
𝒏=𝟑𝟎.𝟎𝟓 𝒚𝒆𝒂𝒓𝒔
The donation will become a gift to the donor after his 80th year.

16. Question #4: Foresight Part (B)
(b) Assume that the donor is 60 years old and has a life expectancy of 25 years. Also assume that the donor and the Art Institute both have a cost of capital equal to 10%. If the donor gives $100,000 to the Art Institute for a charitable gift annuity, what is the true value of the gift to the Art Institute?
Given: n=25 years; r=10%; Coupon rate=6.9%; Donation = $100,000
𝑃𝑉 𝑎𝑛𝑛𝑢𝑖𝑡𝑦 = 𝐶 𝑟 1− 𝑟 𝑛
𝑃𝑉 𝑎𝑛𝑛𝑢𝑖𝑡𝑦 = − =$62,631.58
𝑇𝑟𝑢𝑒 𝑣𝑎𝑙𝑢𝑒 𝑜𝑓 𝑔𝑖𝑓𝑡=$100,000−$62,631.58
𝑻𝒓𝒖𝒆 𝒗𝒂𝒍𝒖𝒆 𝒐𝒇 𝒈𝒊𝒇𝒕=$𝟑𝟕,𝟑𝟔𝟖.𝟒𝟐

17. Question #5: John’s car Part (a)
John plans to buy a new car five years from now. Over the next five years (starting from next month) John wishes to save a certain percentage of his monthly income in a saving account that yields an interest rate of 0.2% per month. John’s current monthly salary is $5,000 and is expected to stay at this level for the next five years.
What percentage of his salary should John allocate to savings in order to purchase a car that will cost $15,000 five years from now?
𝑃𝑉= 𝐹𝑉 1+𝑟 𝑛 = 15, =$13,305.40
𝑃𝑉= 𝐶 𝑟 × 1− 𝑟 𝑛
$ = 𝐶 −
𝐶=$𝟐𝟑𝟓.𝟓𝟓
⇒𝟒.𝟕𝟏% 𝑜𝑓 𝑠𝑎𝑙𝑎𝑟𝑦 𝑠ℎ𝑜𝑢𝑙𝑑 𝑏𝑒 𝑠𝑎𝑣𝑒𝑑 𝑚𝑜𝑛𝑡ℎ𝑙𝑦.
t=0 … 𝐶
t=1
t=2
t=60
FV=$15,000

18. Question #5: John’s car Part (b)
(b) In the meantime, John is considering taking a loan from the bank in order to purchase a $5,000 old car today. John will be able to sell this car for $3,000 in five years and will repay the loan over the next five years. The bank is willing to offer John an interest rate of 0.2% per month on this loan if repaid in equal monthly payments for the next 60 months. Assume that John will use the funds received from selling the old car to purchase the new car. What percentage of his salary in total should John put aside in the next five years in order to repay the loan for the old car and save for the new car?
Car rental:
Payment for old car today (PV) = $5,000
Sale of old car in year 5 (FV) = $3,000
𝑃𝑉=5000− = 𝐶 −
⇒𝑪=$𝟒𝟏.𝟒𝟏
⇒ Total savings required = $ $41.41 = $276.96
t=0 … 𝐶
t=1
t=2
t=60
FV=$3,000
PV=$5,000

19. Question #5: John’s car Part (c)
(c) Finally, John is considering an alternative of renting for the next five years (until buying the new car). For what rent would it be more cost effective to rent a car for the next five years instead of purchasing (and selling) the old car?
Any rent below the increased savings required for purchasing a old car is more cost effective.
i.e. Rent less than $ $276.96−$235.55
⇒𝑹𝒆𝒏𝒕=$𝟒𝟏.𝟒𝟏 𝒐𝒓 𝟎.𝟖𝟐% 𝒐𝒇 𝒔𝒂𝒍𝒂𝒓𝒚

20. Question #6: Noah’s well Part (a)
Noah’s firm is considering purchasing an operating oil well. Noah expects that his firm should be able to extract 1,500,000 barrels of oil annually from this new oil well for the next 10 years. Assume an annual cost of capital of 4%.
Suppose that after all expenses the firm can sell a barrel of oil for profit of $25 per barrel. If this level of profits remains the same over the next 10 years, then what is the highest price that Noah’s firm should be willing to pay for this well?
𝑌𝑒𝑎𝑟𝑙𝑦 𝑐𝑎𝑠ℎ 𝑓𝑙𝑜𝑤𝑠=$25×1.5𝑀=$37.5𝑀
Highest price Noah would pay is present value of future cash flows from the well.
𝑃𝑉= 𝐶 𝑟 1− 𝑟 𝑛 = −
Highest price = $304,158,591.73
t=0 …
$37.5𝑀
t=1
t=2
t=10

21. Question #6: Noah’s well Part (b)
(b) Now suppose that due to an expected upward trend in oil prices in the next ten years, analysts expect that profits per barrel of oil will remain at $25 this year but will increase at a 2% annual growth rate in the following years. How should this change your answer to part (a)?
This is a growing annuity.
𝑃𝑉= 𝐶 𝑟−𝑔 1− 1+𝑔 1+𝑟 𝑛
𝑃𝑉= $37.5𝑀 0.04− −
𝑷𝑽=$𝟑𝟑𝟎,𝟗𝟐𝟎,𝟕𝟏𝟒.𝟕𝟐
t=0
$37.5𝑀
t=1
$37.5𝑀(1.02)
t=2 … t

22. Question #6: Noah’s well Part (c)
(c) While Noah is confident regarding this year’s capacity, he is a bit skeptical regarding the ability of the well to generate a steady stream of 1.5 million barrels. Noah suggested to his firm to use a more conservative approach that assumes a negative growth rate of 5% in the well’s capacity starting from next year. What is the highest price that the firm should be willing to pay for this well (assume still a 2% increase in profits as in part (b))?
𝐺𝑟𝑜𝑤𝑡ℎ 𝑟𝑎𝑡𝑒 𝑜𝑓 𝑐𝑎𝑠ℎ 𝑓𝑙𝑜𝑤𝑠 = 1−0.05 × =0.969
⇒𝐺𝑟𝑜𝑤𝑡ℎ 𝑟𝑎𝑡𝑒 𝑜𝑓 𝑐𝑎𝑠ℎ 𝑓𝑙𝑜𝑤𝑠=−3.1%
𝑃𝑉= $37.5𝑀 0.04−(−0.031) 1− 1−
𝑷𝑽 =$𝟐𝟔𝟕,𝟕𝟒𝟕,𝟐𝟑𝟕.𝟗𝟕
t=0
$37.5𝑀
t=1
$37.5𝑀(0.969)
t=2 … t

23. Question #7: Charlotte’s Retirement Part (a)
Charlotte is exactly 30 years old and wishes to start saving for retirement. Charlotte’s financial advisor advised her to save a fixed amount of $10,000 at the end of each year starting from the end of this year until she reaches the age of 65 (at that time the last installment is made). The saving account will carry an interest of 4%.
How much money will Charlotte have accumulated in savings at the age of 65?
𝑃𝑉= 𝐶 𝑟 × 1− 𝑟 𝑛
𝑃𝑉= $10, × 1− =$𝟏𝟖𝟔,𝟔𝟒𝟔.𝟏𝟑
𝐹𝑉=𝑃𝑉× 1+𝑟 𝑛 =$186,646.13×
⇒𝑭𝑽=$𝟕𝟑𝟔,𝟓𝟐𝟐.𝟐𝟓
t=0 …
$10𝐾
t=1
t=2
t=35

24. Question #7: Charlotte’s Retirement Part (b)
(b) Charlotte however wishes to accumulate $1 million till that time. By how much shall Charlotte increase her annual payment to achieve this goal?
𝑃𝑉= 𝐹𝑉 1+𝑟 𝑛 = $1𝑀 =$𝟐𝟓𝟑,𝟒𝟏𝟓.𝟒𝟕𝟏
𝑃𝑉= 𝐶 𝑟 × 1− 𝑟 𝑛
$253, = 𝐶 −
⇒𝑪=$𝟏𝟑,𝟓𝟕𝟕.𝟑𝟐
Annual payments have to be increased by $3,577.32
t=0 … 𝐶
t=1
t=2
t=35
𝐹𝑉=$1𝑀

25. Question #7: Charlotte’s Retirement Part (c)
(c) Suppose that at age 50 Charlotte decides to withdraw $50,000 from her saving account to cover some unexpected expense. By how much should Charlotte increase her annual payment (starting at age 51) in order to still achieve her $1 million goal?
𝑃𝑉= 𝐶 𝑟 1− 𝑟 𝑛
$50,000= 𝐶 0.04 × 1−
⇒𝐶=$𝟒,𝟒𝟗𝟕.𝟎𝟔
Annual payments have to be increased by $4, to a total of $18,
t=0 𝐶
t=20
t=1
t=2
t=35
𝐹𝑉=$1𝑀 … … … …
−50,000