***********Just Need help with part B please!

The income statement from 2013 to 2017 of Kung Food Equipment, Inc., a restaurant equipment supplier, appears below. Kung Food Equipment, Inc. Annual Income Statements For the Years 2013 to 2017 (U.S. SMillions) Dec-17 Dec-16 Dec-15 Dec-14 Dec-13 Revenue 59,200 49,700 48,300 41,700 35,400 Cost of Revenue, Total 41,440 34,790 33,810 29,190 24,780 Gross Profit 17,760 14,910 14,490 12,510 10,620 Selling General Admin. Exp. 9,380 7,955 7,745 6,755 5,810 Research & Development Exp. 1,500 1,500 1,500 1,500 1,500 Net Operating Income 6,880 5,455 5,245 4,255 3,310 Other Income,Net 100 100 100 100 100 EBIT 6,980 5,555 5,345 4,355 3,410 Interest Expense 1.400 1,200 1,200 1.100 800 Pre-tax Income 5,580 4,355 4,145 3,255 2,610 Income Tax - Total 2,232 1,742 1,658 1,302 1,044 Net Income 3,348 2,613 2,487 1.953 1,566 1,200 800 500 1,413 Less: Preferred Dividends Net Income Available to Common Common Shares Outstanding (M) Earnings per Share 1,500 7,848 1,000 $1.85 1,000 1,487 1,000 $1.49 1,153 1,000 $1.41 1,000 $1.15 1,066 1,000 $1.07 a) Enter the data into your worksheet. Costs of revenues are variable costs. Also, research & development expenses are fixed costs. Finally, $500M of selling/general/administrative expenses constitute fixed costs while the rest are variable costs. b) Determine the degree of operating, financial and combined leverage for each year