7.1. A computer-products retailer purchases laser printers from a manufacturer at a price of $500 per printer. During the year the retailer will try to sell the printers at a price higher than $500 but may not be able to sell all of the printers. At the end of the year, the manufacturer will pay the retailer 30 percent of the original price for any unsold laser printers. No one other than the manufacturer would be willing to buy these unsold printers at the end of the year.

a) At the beginning of the year, before the retailer has purchased any printers, what is the opportunity cost of laser printers?