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about the store's financial performance during the year of 2018. Please make sure to round the answers up to two decimal points. Dollar amount Merchandising Ratio (%) Gross Sales Customer returns 1% Customer allowances $0.00 Net sales $400,000 Cost of goods sold (COGS) $180,000 Gross margin 55.00% $167,200 41.80% Expenses Operating profit Average inventory $250,000