need help getting percentages

According to the producer price index database maintained by the Bureau of Labor Statistics, the average cost of computer equipment fell 3.8 percent between January and December 2016. Required: 1. Conduct a horizontal analysis by calculating the year-over-year changes in each line item, expressed in dollars and in percentages for the income statement of Computer Tycoon Inc. for the year ended December 31, 2016. 2-a. Conduct a vertical analysis by expressing each line as a percentage of total revenues. 2-b. Excluding income tax, interest, and operating expenses, did Computer Tycoon earn more profit per dollar of sales in 2016 compared to 2015? Complete this question by entering your answers in the tabs below. Reg 1 Req 2A Req 2B Conduct a horizontal analysis by calculating the year-over-year changes in each line item, expressed in dollars and in percentages for the income statement of Computer Tycoon Inc. for the year ended December 31, 2016. (Decreases should be indicated by a minus sign. Round percentage values to 1 decimal place.) :% COMPUTER TYCOON, INC. Income Statements For the Year Ended December 31 Change in 2016 2015 Dollars Percentage Sales Revenue $ 110,000 $ 135,000 $ (25,000) Cost of Goods Sold 65,000 75,500 (10,500) Gross Profit 45,000 59,500 (14,500) Selling, General, and Administrative Expenses 37,000 39,000 (2.000) Interest Expense 600 525 75 Income before Income Tax Expense 7,400 19,975 (12,575) Income Tax Expense 1,500 6,000 (4.500) Net Income $ 5,900 $ 13,975/S (8,075) 100751 Complete this question by entering your answers in the tabs below. Req 1 Req 2A Req 2B Conduct a vertical analysis by expressing each line as a percentage of total revenues. (Round percentage values to 1 decimal place.) COMPUTER TYCOON, INC. Income Statements For the Year Ended December 31 2016 $ % $ Sales Revenue Cost of Goods Sold Gross Profit Selling, General, and Administrative Expenses Interest Expense Income before Income Tax Expense Income Tax Expense Net Income 110,000 65,000 45,000 37,000 600 7,400 1,500 5,900 2015 135,000 75,500 59,500 39,000 525 19,975 6,000 13,975 $ % $