Green has been in business in several years and has provided the following budgeted information. Revenue 12 000 13 000 Purchases 7 000 8 500 Depreciation 60 60 Office expenses 3 150 3 100 2020 November December 2021 January February March April 60 15 000 13 000 14 000 16 000 9 000 7 500 9 500 6 500 60 75 75 3 100 3 400 3 550 3 350 Additional information 1. 10% of all revenue are cash sales 2. 50% of credit customers pay in the month following sale and receive a 4% cash discount. Remaining trade receivables pay in the month following sale. 3. All purchases are on credit and are paid for in the month following purchase. 4. Annual insurance of $4 500 is paid in two equal instalments on 1 February and 1 August each year. 5. Dividend amounting to $1 550 is expected to be paid on 25 January 2021. 6. Office expenses are paid one month in arrears. 17. Green contracted a 10% bank loan of $5000, 1 March 2021 to buy some non current assets. 8. The balance at bank is expected to be $652 overdrawn. REQUIRED (a) Prepare a cash budget for each of the four months ending 30 April 2021. (20 marks) (b) What is zero based budgeting and how does it differ from traditional forms of budgeting