Winnie's Car Wash is a perfectly competitive firm. The table above shows Winnie's total product schedule. If the price of a car wash is $4, and Winnie maximizes his profit when he employs 3 workers, the wage rate is

The price paid to purchase land

A) has no relation to cost because it did not cost anything to produce the land. B) rarely has any relation to cost because it has usually been determined by competitive bidding. C) usually depends on the cost to the seller of letting the purchaser have the land. D) would more accurately reflect the social value of the land if the price were zero.

Economists pay special attention to making choices at the margin

a. true b. false