1. List the costs that would likely be included in each of the following marginal-cost calculations. (You may select more than one answer. Single click the box with the question mark to produce a check mark for a correct answer and double click the box with the question mark to empty the box for a wrong answer. Any boxes left with a question mark will be automatically graded as incorrect.)

Required: 1. The marginal cost of one additional passenger on an American Airlines flight.

check all that apply

Food and beverages

Increase in fuel costs

Direct labor

Advertising expenses

2. For each case below, find the missing amount.

3.