5) A farmer grows wheat and barley on his 500 acres of cropland. He expects to profit $150 per acre for wheat and $ 180 per acre for barley. The cost of raising each crop (seed, pesticide, etc.) is $60 per acre for wheat and $90 per acre for barley. The farmer can budget $ 36,000 for the growing of the crops. To maximize his profit, how many acres of each crop should be grown