Answer:
1. This cost is the combined amount of all the other costs. ⇒ TOTAL COST.
2. This cost remains constant over a limited range of volume; when it reaches the end of its limited range, it changes by a lump sum and remains at that level until it exceeds another limited range. ⇒ STEP-WISE COST.
3. This cost has a component that remains the same over all volume levels and another component that increases in direct proportion to increases in volume. ⇒ MIXED COST
4. This cost increases when volume increases, but the increase is not constant for each unit produced. ⇒ CURVELINEAR COST.
5. This cost remains constant over all volume levels within the productive capacity for the planning period.⇒ FIXED COST.
6. This cost increases in direct proportion to increases in volume; its amount is constant for each unit produced. ⇒ VARIABLE COST.