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Answer:
Cost A is a fixed cost as it is constant in total on both levels of activity.
Cost B is a variable cost as the cost per unit is constant at both activity levels.
Cost C is a mixed cost as it is neither constant in total nor on per unit basis.
Explanation:
A fixed cost is a cost that remains constant at each activity level within a relevant range or under short period of time. This is a cost which is incurred even if no unit is produced or sold. The fixed cost per unit falls as the activity level increases.
A variable cost is a cost that varies or changes with changes in activity level. The variable cost per unit remains constant within a relevant range or under short period of time. This cost is not incurred if no unit is produced or sold.
A mixed cost is a cost which has an element of both the fixed and the variable cost. The variable cost per unit under a mixed cost can be calculated by subtracting the fixed cost from the total mixed cost.
Cost A is a fixed cost as the total cost is constant at both activity levels of 1000 units and 4000 units. Besides, cost per unit is falling as volume increases.
Cost B is a variable cost as, although the total cost is increasing with increase in volume, the cost per units is constant.
Cost C is a mixed cost as it is neither fixed in total nor in per unit. It is a mixed cost with a variable element of $12 per unit and total fixed element of $20000.
Cost C, Variable cost per unit = (68000 - 32000) / (4000 - 1000) = 12 per unit
Total Fixed cost element of cost C = 68000 - (4000 * 12) = $20000
Cost A is the fixed cost, cost B is the variable cost, and cost C is the semi-variable cost.
What is fixed, variable, and semi-variable cost?
Fixed cost is the cost that remains fixed at every level of output. It neither increases nor decreases with the output. Therefore, Cost A is a fixed cost.
Variable cost changes with the change in output. Variable cost per unit is always fixed. Therefore cost B is a variable cost.
Semi-variable cost refers to the cost that is neither fixed nor variable. A portion of this cost is fixed. Per unit semi-variable costs are different at different levels. Therefore cost C is a semi-variable cost.
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