A fruit grower has 150 acres of land available to raise two
crops, A and B. It takes one day to trim an acre of crop A and
two days to trim an acre of crop B, and there are 240 days per
year available for trimming. It takes 0.3 day to pick an acre of
crop A and 0.1 day to pick an acre of crop B, and there are 30
days per year available for picking. Find the number of acres
of each fruit that should be planted to maximize profit,
assuming that the profit is $140 per acre for crop A and $235
per acre for crop B.