A music store has 500 guitar picks. They order 15 boxes with 9 picks each. They sell 19 boxes that have 10 picks each. The store manager says they now have about 450 guitar picks. Is the manager's estimate reasonable? The manager’s estimate is reasonable. They ordered about 200 picks and sold about 150 picks so they should have about 50 fewer than they started with. The manager’s estimate is reasonable. They ordered about 150 picks and sold about 200 picks so they should have about 50 fewer than they started with. The manager’s estimate is not reasonable. They ordered about 200 picks and sold about 150 picks so they should have about 50 more than they started with. The manager’s estimate is not reasonable. They ordered about 200 picks and sold about 200 picks so they should have about the same number of picks as they started with.