Please show work and explain how to do these

Use the following information to answer questions 6 through 8 Financial information is presented below: Operating Expenses Sales Returns and Allowances Sales Discount Sales Cost of Goods Sold $ 45,000 13,000 6,000 150,000 67,000 Gross Profit would be a. $77,000 b. $64,000 c. $70,000 d. $83,000 6. The gross profit rate would be a. .535 b. 489 C. .511 d. .553 7. 8 The profit margin ratio would be a. .127 b. 132 c. .139 d. 145