Westlawn Company discloses the following for the year ended May 31, 2020: Sales Sales discounts Sales returns Gross profit from sales Loss $500,000 6,400 13,500 129,000 30, 500 5 Requlred: a. Calculate the net sales. Net sales b. Calculate the total operating expenses. Total operating expenses c. Calculate the cost of goods sold. Cost of goods sold d. Calculate the gross profit ratio. (Round your final answer to 2 declmal places.) Gross profit ratio %