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 3 units of zinc for each unit of alloy produced.If no other inputs are needed, the price of copper is $3, and the price of zinc is $3, what is the average cost per unit when 4,000 units of the alloy are produced?

A) $9.50
B) $1,000
C) $1
D) $18
E) $9,500