Complete the following statements with one of the terms listed here. You may use a term more than once, and some terms may not be used at all. a. A(n) __________ is the cost of making one more unit. b. Gasoline is one of many _________ in the operation of a motor vehicle. c. A product's _________ and ________, not the product's _________, should be used to forecast total costs at different production volumes. d. Within the relevant range, __________ do not change in total with changes in products' volume. e. The ___________ per unit declines as a production facility produces more units. f. Costs that differ between alternatives are called ________. g. In the long run, most costs are _________, meaning that management is able to influence or change the amount of the cost. h. _________ are costs that have already been incurred