QS 4-15 Computing and analyzing gross margin ratio LO A2 Carrier Lennox Trane York Sales $ 150,000 $ 550,000 $ 38,700 $ 255,700 Sales discounts 5,000 17,500 600 4,800 Sales returns and allowances 20,000 6,000 5,100 900 Cost of goods sold 79,750 329,589 24,453 126,500 Compute net sales, gross profit, and the gross margin ratio for each of the four separate companies. (Round your gross margin ratio to 1 decimal place; i. e.; 0.2367 should be entered as 23.7%.)