For the base case in this section, as a percentage of sales, COGS - 73 percent, SGA - 14 percent, R&D - 2.6 percent. Depreciation, Interest expense are fixed as stated. Tax Rate is 19 percent. 1.a Given the following case, calculate the independent effects of a 1 percent increase in Gross Margin, a 1 percent decrease in the TaxRate, and a 5 percent increase in Sales. Colossal Chemical Corporation Year Ended December 31, 2021 ($000,000 omitted) Base Case 1% Increase in Gross Margin 1% Decrease in Tax Rate 5% Increase in Sales $ ales 2,110 $ $ Cost of goods sold 1,540 Selling general, and 295 administrative expense Depreciation 160 Research and development 55 $ Total costs and expenses $ 2,050 perating Income 60 Interest expense 39 arnings before Income Taxes $ 21 $ rovision for Income Taxes 4 et Income $ 17 $ $