What is the typical effect on base unit cost when adding small production beyond the initial base?

What is the typical effect on base unit cost when adding small production beyond the initial base?

• A. Remains the same
• B. Increases
• C. Decreases
• D. Becomes negative

Answer: (B)

When production moves beyond the base level, per-unit costs often rise because costs that don’t scale with volume kick in as you push past the base. These are fixed or step-fixed costs that are triggered by increasing output—for example, a new setup for the next batch, overtime pay, or buying capacity at a higher rate. Since these extra costs are not spread across a large number of units, they lift the average cost per unit. Think of it this way: at the base level you’ve already allocated fixed costs over those units. If you produce a bit more and incur an additional setup or higher input costs specifically for that marginal output, those added costs raise the total cost for the entire batch and the per-unit cost goes up. For instance, with a fixed cost of 100 and a variable cost of 5 per unit, producing 10 units gives a base unit cost of (100 + 50)/10 = 15. If producing 11 units requires an extra setup cost of 20, the total cost becomes 100 + 20 + 11×5 = 175, and the unit cost is 175/11 ≈ 15.9, higher than before. So the typical effect of adding small production beyond the initial base is an increase in the base unit cost.

When production moves beyond the base level, per-unit costs often rise because costs that don’t scale with volume kick in as you push past the base. These are fixed or step-fixed costs that are triggered by increasing output—for example, a new setup for the next batch, overtime pay, or buying capacity at a higher rate. Since these extra costs are not spread across a large number of units, they lift the average cost per unit.

Think of it this way: at the base level you’ve already allocated fixed costs over those units. If you produce a bit more and incur an additional setup or higher input costs specifically for that marginal output, those added costs raise the total cost for the entire batch and the per-unit cost goes up. For instance, with a fixed cost of 100 and a variable cost of 5 per unit, producing 10 units gives a base unit cost of (100 + 50)/10 = 15. If producing 11 units requires an extra setup cost of 20, the total cost becomes 100 + 20 + 11×5 = 175, and the unit cost is 175/11 ≈ 15.9, higher than before.

So the typical effect of adding small production beyond the initial base is an increase in the base unit cost.