Which of the following is an an example of a sunk cost? a. Jossie purchases a textbook online but returns it because it is the wrong edition
b. Maria goes to a lunch vending machine to get a quick snack. In her haste, she mistakenly pushes the wrong buttons and gets a wheatgrass sandwich instead of hot pocket she was craving.
c. Kennys new smartphone stops working, but it is still under warranty, so he is able to have it repaired at no cost.
d. Antonio goes to the movies. After the opening credits, he realizes he is in the wrong theater. He informs the manager and is able to get a refund.

Rolston music company is considering the sale of a new sound board used in recording studios. the new board would sell for $27,200, and the company expects to sell 1,570 per year. the company currently sells 2,070 units of its existing model per year. if the new model is introduced, sales of the existing model will fall to 1,890 units per year. the old board retails for $23,100. variable costs are 57 percent of sales, depreciation on the equipment to produce the new board will be $1,520,000 per year, and fixed costs are $1,420,000 per year. if the tax rate is 35 percent, what is the annual ocf for the project?