Calculate gross profit ratio from the following information given. Sales is OMR 200,000; Sales returns is OMR 50,000; Cost of goods sold is OMR 112,500; Gross Profit is OMR 37,500 and Net profit is OMR 20,000 O a. 18.75% O b. 33.33% O c. 25% O d. None of the given options