Ralph Cartwright earned $728.50 last summer mowing yards. He charged an average of $15.50 per yard. How many yards did he mow? Ralph (35) spent $53.20 on gasoline and $47.90 on other equip ment for his yardwork. His lawn mower depreciated $25 during the summer. What was his net profit? Ralph (36) worked a total of 120 hours on the lawns. What was his net pay per hour? (Use net profit to find net pay per hour.) Mark Johnston's little sister operated a lemonade stand during the summer. She made $49.70 from the 70 glasses of lemonade she sold. How much did she charge per cup of lemonade? Jay's Bird Feeders had an inventory of $8,987.42 at the beginning of the month. They purchased $6,204.97 of merchandise during the month. What was the value of the goods available for sale? Jay's Bird Feeders (39) had $8,423.18 in inventory at the end of the month. The store had $21,683.50 in net sales during the month. Find the gross profit for the month