Answer:
$18 per unit
Step-by-step explanation:
Average cost per unit is the cot of the product to product on average basis. Any product uses different costs to produce like material, Labor and overheads.
In this question there is only material cost of Copper and Zinc material to make Alloy.
Total Cost = 4,000 units [($3x3)+($3x3)] = $72,000
Average cost per unit = Total Cost / Total numbers of unit
Average cost per unit = $72,000 / 4,000 = $18 per unit