1. Microsoft Excel

2. Excel Formatting Rules
Numbers greater than 999 should be formatted to display a comma.
Use a consistent number of decimal places for all numbers containing decimals. If any currency values on a spreadsheet display cents (more than 0 cents), then all currency values on a spreadsheet should be formatted to display 2 decimal places.
Right-align columns of numbers. Never left-align columns of numbers.
Labels should be directly over the numbers that they describe. Move the label so that it is directly over the numbers it describes. NEVER move the numbers so that they are under the label.
Currency values need to display with a $ sign using the currency style (and not accounting style which happens when you click the $ sign button).
Create formulas using cell references whenever possible. Don’t hard-code your formulas using real numbers. Creating formulas using cell references lets you create the interactive formula, so that when you change the contents of one cell, the formula result will automatically adjust itself.

3. Excel Functions
The IF function is used in spreadsheet decision making, and it requires 3 arguments.
The condition being tested for (the cell and the actual test)
What to do if the condition is true
What to do if the condition is false
It yields one result if the condition is true, and a different result if the condition is false.

4. The VLOOKUP function determines where within a specified table, a value (either numeric or text) is found, and then it retrieves a entry from the table that corresponds to the value, and it requires 3 arguments.
The value to be looked up
The table range where that value can be found
The column containing the corresponding value. Entered as a number (2,3, etc.) in your function When creating the table used by your VLOOKUP, the table value breakpoints (in the first column) should be arranged in alphabetical order or low number to high number order.

5. Excel Functions
PMT: Used to calculate the periodic payment on a loan (car loan, home loan)
Most payments are made monthly.
PMT function requires three arguments
Interest rate per period (annual rate divided by 12 for monthly rate)
NPER: number of payment periods (# of yrs * 12 months/year)
Amount of the loan (entered into the function as a negative number so your function result ends up positive)