Exercise 5-10 Calculating expenses and cost of goods sold-perpetual L.O1, 3, 5, 6 Westlawn Company discloses the following for the year ended May 31,2020 : Required Calculate (a) net sales, (b) total operating expenses, (c) cost of goods sold, and (d) gross profit ratio (round to two decimal places). Analysis Component: Refer to your answer in part (d). Westlawn experienced a gross profit ratio for the year ended May 31,2019, of 22%. Is the change in the ratio favourable or unfavounble