please solve ASAP

The Quinn Corporation shows the following income statement. The firm uses FIFO inventory accounting. QUINN CORPORATION Income Statement for 2015 Sales . ..... $100,000 (10,000 units at $10) Cost of goods sold . 50,000 (10,000 units at $5) Gross profit. . ... ....... 50,000 Selling and administrative expense. ..... . .. 5,000 Amortization. . .... 10,000 Operating profit. . ..... 35,000 Taxes (34%) ....... 11,900 Aftertax income . . .... $ 23,100 a. Assume that the same 10,000 unit volume is maintained in 2016, but the sales price increases by 10 percent. Because of FIFO inventory policy, old inventory will still be charged off at $5 per unit. Also assume that selling and administrative expense will be 5 percent of sales and amortization will be unchanged. The tax rate is 34 percent. Compute aftertax income for 2016. b. In part a, by what percent did aftertax income increase as a result of a 10 percent increase in the sales price? Explain why this impact occurred