Answer:
Variable cost Per Unit $2.50
Explanation:
Total cost at high activity = $8100
Total Cost at Low activity = $3600
Total Units at high activity = 2400
Total Units at low Activity = 600
Variable Cost Per Unit = (High activity total Cost - Low activity total cost ) / (High Activity unit - low activity units)
Variable cost per unit = ($8100 - $3600) / (2400 - 600) = $4500 / 1800 = $2.50