Solve the linear programming problem.
Two kinds of crated cargo, A and B, are to be shipped by truck. The weight and volume of each type are given in the following table:

The shipping company charges $75 per crate for cargo A and $100 per crate for cargo B. The truck has a maximum load limit of 7,200 pounds and 1,000 cubic feet. How many of each type of cargo should be shipped to maximize profit for the shipping company?
◦ 10 crates of cargo A and 18 crates of cargo B
◦ 20 crates of cargo A and 0 crates of cargo B
◦ 0 crates of cargo A and 20 crates of cargo B
◦ 18 crates of cargo A and 10 crates of cargo B