The dealership buys cars for $15000$. When the dealer sells each car for $25000$, she sells $24$ cars per month. For each reduction of $600$ in the selling price, the dealer sells $2$ more cars per month. Determine the number of cars sold in one month to maximize profit.
I know the cost function should be $c(x) = 15000x$ , but what is the revenue function?
The answer is $29$. Thanks for any help.