Calculate the return on investment (as a %) for the given company. (Round your answer to the nearest tenth of a percent.) Company Net Sales Cost of Goods Sold Gross Profit Operating Expenses a countertop installer $762,500 $486,560 $275,940 $178,410 Net Profit Gross Profit Margin (%) Net Profit Margin (%) Owner's Equity Return on Investment (%) $97,530 36.2% 12.8% $424,210 %