QS 5-15 Computing and analyzing gross margin ratio LO A2 Carrier Lennox Trane York Sales $ 160,000 $ 750,000 $ 48,000 $ 267,000 Sales discounts 2,000 17,000 600 4,400 Sales returns and allowances 18,000 6,000 4,900 1,300 Cost of goods sold 93,800 466,007 31,450 130,650 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%.)

Atennis club charges a monthly membership fee of $150 and charges it members $10 per hour to use a court. there's also $500 fee to become a member. stella joined the tennis club last spring, and she has been a member for 5 months. she has been playing 10 hours of tennis each month. stella values an hour of her time at $20. during a boring afternoon meeting, stella thinks about reserving a court to work on her serve for an hour tonight. what's stella's opportunity cost of working on her serve for an hour?