1. © Nuffield Foundation 2011 Free-Standing Mathematics Activity Invoices

2. © Nuffield Foundation 2011 In this activity you will learn about invoices, discounts and VAT, and check that they are worked out correctly. iphone image by Daniel Zanetti reproduced under the Creative Commons Attribution/Share-Alike 3.0 unported license

3. © Nuffield Foundation 2011 How do you check if this is right? Think about How do you work out 5 % and 20 %? What do you do with the discount and VAT? Think about How do you work out 5 % and 20 %? What do you do with the discount and VAT?

4. © Nuffield Foundation 2011 Here is one for you to work out INVOICEJ & C CATERERS Ltd 27 MARKET ST DOWNTON DescriptionQuantityUnit cost Gross Sandwiches720.80 Vol-au-vents600.47 Bowls of salad62.55 French loaves60.70 5 % discount Terms: Monthly VAT @ 20 % TOTAL

5. © Nuffield Foundation 2011 Electricity bill Think about Are the amounts in pounds or pence? How do you change from pence to pounds? What do you do with the VAT? Think about Are the amounts in pounds or pence? How do you change from pence to pounds? What do you do with the VAT?

6. © Nuffield Foundation 2011 At the end of the activity What is an invoice? How do you work out 10 %, 5 %, 20 %? What do you do with a discount? What is VAT? What do you do with VAT? Do you prefer to work things out with a calculator or a spreadsheet? Why?