Looking to invest in his first pair of dress shoes, Sean is deciding between a pair of slip-on shoes and a pair of traditional lace-up wingtips. In this case, the slip-ons cost $50 more than the wingtips. Which of the following should be included in the opportunity cost of buying the slip-ons? a. the classic, snazzy look that comes with wearing wingtips.
b. the pride that comes with wearing a pair of wearing wingtips Alden shoes.
c. the savings that would come from buying the wingtips.
d. the no-lace convenience of slip-ons.
e. the money that would be spent to buy the wingtips.

C) Materials for making a product.

Variable costs are costs that go up and down based on a variety of factors. Rent for a warehouse will be the same every month for the duration of the lease, and won't change based on production or anything else.

Salaried employees are paid a fixed amount regardless of their hours each week (unlike hourly/non-exempt employees) so this would not change either .

Finally, the payments on a loan are generally the same from month to month.

Materials used in making a product are a variable cost because if you make more of the product, your cost for materials goes up. If you make less of it, the cost goes down.