21. Turkeys. A farmer bought a batch of turkeys, which cost 60 dollars. Leaving 15 birds for himself, the farmer sold the rest of the turkeys for 54 dollars. In doing so, he made a profit of 10 cents per bird. How many turkeys did he buy?
21. Seventy-five turkeys were bought at 80 cents each, for a total of 60 dollars. Leaving 15 birds for himself, the farmer sold the remaining 60 turkeys at 90 cents each, for a total of 54 dollars, as required. Thus, he made a profit of 10 cents on each of the 60 resold birds.