fees. Annual : $ Hourly: 5 A football stadium has 20 000 seats between the goal lines and 5000 in the end zones. An end-zone seat is $5 cheaper than one between the goal lines. For one game, the revenue was $:350 000 when all seats were sold. What is the cost of each type of seat? When 20 bolts are placed in a box, the total mass is 340g. When there are 48 bolts in the box, the total mass is