A farmer has 100 acres of available land which he wishes to plant with the mixture of potatoes, corn, and cabbage. It cost him $400 to produce an acre of potatoes, $160 to produce acre of corn, and $280 to produce an acre of cabbage. He has maximum of $20,000 to spend. He makes a profit of $120 per acre of potatoes, $40 per acre of corn, and $60 per acre of cabbage. How many acres of each crop must he plant to maximize profit?
A. Make a chart to organize info
B. Write down the objective funtion
C. Write down all the contraints to the problem