Answer:
Average total cost per unit = $100
Step-by-step explanation:
The average total cost is the the total cost divided y the number of units
Average cost = (Total variable cost + Total fixed cost)/ Number of units
Total variable cost = (20× 400)= 8000
Total fixed cost = 6,000
Average total cost = ( 8000 + 6000)/140 = $100
Average total cost per unit = $100