When it started, the company considered two sets of accounting policies:
Accounting policy set 1:
a. Use straight-line depreciation method on the firm€™s only asset. The computer cost $1,000,000 and has an estimated useful life of four years.
b. Estimate warranty expense as 9% of sales.
c. Estimate bad debts expense as 5% of sales.
Accounting policy set 2:
a. Use 50% declining-balance method for depreciation.
b. Estimate warranty' expense as 10% of sales.
c. The year-end allowance for doubtful accounts should be 40% of gross accounts receivable.
Actual events, cash flows, and transactions are as follows:

Required:
a. Derive net income for 2009 to 2012 using the first set of accounting policies. For the year-end balance for 2012, assume accounts receivable, allowance for doubtful accounts, and the warranty accrual are $0, as the firm wound itself up during the year and all timing differences have been resolved.
b. Derive net income for 2009 to 2012 using the second set of accounting policies. For the year-end balance for 2012, assume accounts receivable, allowance for doubtful accounts, and the warranty accrual are $0, as the firm wound itself up during the year and all timing differences have been resolved.
c. Derive the annual net cash flows for 2009 to 2012.
d. What is the sum of the net income for the four years for the two sets of accounting policies? W hat is the sum of the net cash flows for the four years? What does this tell us about net income and accrual accounting?
e. Why' were the net incomes different between the two sets of accounting policies?
f. What caused the net income in 2012 to be so high for the second set of accounting policies?

2009 2010 2011 2012 Sales (all on account) Warranties paid Proceeds on disposal of computer Accounts receivable collected in year Accounts receivable written off in year All other expenses (paid in cash in year incurred) $3,000,000 $3,500,000 $4,000,000 $500,000 250,000 275,000 410,000 180,000 400,000 3,800,000 1,200,000 200,000 175,000 2,600,000 100,000 2,800,000 125,000 2,100,000 2,500,000 2,700,000 350,000