Gaines ended her workday on August 10 in Kansas City. However, her next scheduled flight departed Topeka at 11:00 a.m. on August 11. This required Gaines to dead-head back to Topeka on an early-morning flight. This means she traveled from Kansas City to Topeka as a passenger, rather than as a working flight attendant. Since the morning flight from Kansas City to Topeka was full, Gaines displaced a paying customer. The revenue lost by the airline was $76.

4-a. What type of cost is the $76?

multiple choice 1

Out-of-pocket cost

Average cost

Marginal cost

Opportunity cost

Differential cost

Sunk cost

4-b. To what flight, if any, is it chargeable?

multiple choice 2

August 11 flight

August 10 flight

Neither flight