Answer:
The variable cost per unit is $0.10. So, option b is the correct answer.
Explanation:
The mixed cost is a cost that has a component of both the fixed and the variable cost. To separate the components of the mixed costs, we use the high-low method to calculate the variable cost per unit component of a mixed cost. The formula for high-low method is,
Variable cost per unit = (Cost at highest activity level - Cost at lowest activity level) / (Highest activity level units - lowest activity level units)
Variable cost per unit = (3500 - 2700) / (18000 - 10000)
Variable cost per unit = $0.1 per unit