a farmer owns a 105 acre farm and plans to plant at most three crops. The seed for crops, A,B and C cost 24, 45, and 30 per acre, respectively. A...

a farmer owns a 105 acre farm and plans to plant at most three crops. The seed for crops, A,B and C cost 24, 45, and 30 per acre, respectively. A maximum of $3,360 can be spent on seed. Crops A,B and C require 1,2 and 2 workday per acre, respectively and there are a mazimum of 180 workdays available. If the farmer can make a profit of $140 per acre on crop A, $200 per acre on crop B and $150 per acre on crop C how many acres of each crop should be palnted to mazimize profit?