I need help with question 2-a

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, 2013. (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 2012 $ 2013 Dollars Percentage (17.31% (15.41% (19.91% (3.51% 8.2% (65.9)1% (81.1)% (56.41% 124,500 72,700 51,800 103,000 61,500 41,500 36,300 530 4,670 1,000 3,670| $ $ (21,500) (11,200) (10.300) 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 37,600 (1.300) 490 13,7|of 5,300 8,410 40 (9,040) (4,300) (4,740) $ $