Suppose That a New Alloy Is Invented Which Uses Copper

Multiple Choice

suppose that a new alloy is invented which uses copper and zinc in fixed proportions where 1 unit of output requires 3 units of copper and 4 units of zinc for each unit of alloy produced.If no other inputs are needed, the price of copper is $2, and the price of zinc is $3, what is the average cost per unit when 3,000 units of the alloy are produced?

A) $18
B) $.67
C) $666.67
D) $9.33
E) $9,333.33