Complete the income statement started below and answer the analytical questions Sales Cost of Goods Sold Gross Margin Wage Expense Rent Expense Marketing Expense Operating Income 2018 8,000 3000 5000 2000 1000 2000 a) Change in CGS in dollars 2018 to 2019 b) CGS% for 2019 c) Operating income % for 2018, 2019 and 2020 d) % change in sales 2019 to 2020 e) % change in wage expense 2018 to 2019 2019 12,000 4000 3000 1000 3000 2020 14,000 5000 9000 4000 3500 500