A Company Manufactures Two Products, a and B

A company manufactures two products, A and B. If x is the number of thousands of units of A and y is the number of thousands of units of B, then the cost and revenue in thousands of dollars are ​ ​
Find the number of each type of product that should be manufactured to maximize profit.
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A) 3,000 units of product A
48,000 units of product B
B) 6,000 units of product A
24,000 units of product B
C) 12,000 units of product A
12,000 units of product B
D) 3,000 units of product A
12,000 units of product B
E) 12,000 units of product A
48,000 units of product B