Atoy warehouse sticks the following trivia games: trivia madness, you know what, and useless knowledge. for each trivia madness they stock, they need to have 6 expansion packs on hand; for each you know what, they need to have 6 expansion packs, and for each useless knowledge, they need 10 expansion packs. they want to have at most 2100 expansion packs on hand. there is a contract in place that requires the warehouse to stock twice as many trivia madness games as useless knowledge games. the warehouse wants to stock at most 300 trivia games in total. the revenue from each game is $30 per trivia madness, $40 per you know what, and $20 per useless knowledge. how many of each game should they stock to maximize revenue?