For the base case in this section, as a percentage of sales, COGS = 70%, SGA = 15 %, R&D is 2.4% Depreciation, interest expense are fixed as stated, tax is 20%. Given the following case, calculate the independent effects of a 1% increase in Gross Margin, a 1% decrease in Tax Rate and a 5% increase in Sales. Sales Cost of Goods Sold SGA Depreciation R&D Total Costs & Expenses Operating Income Interest Expense Earnings Before Taxes Provisions for Taxes Net Income base cost 1% increase in Grose Margin 1% Decrease in Tax Rate 5% Increase in Sales 2110 1477 317 160 51 2005 105 39 66 13 53