Hi, I've been struggling with this part of the chapter for a few hours now and would appreciate some help.

Last year Jerry's Tents sold 150 tents for $550 each. The manager estimates that for each $50 increase in price, the number sold will decrease by 5.

A) Represent the number of tents sold, n , as a function of the selling price, s dollars.

B) Represent the revenue, R dollars, as a function of the selling price.

C) What is the maximum revenue?

D) What selling price produces maximum revenue?

E) What range of selling prices will provide revenue greater than $100 000?

I just wrote all the questions down so you could understand how the question is supposed to be answered. I don't get anything after part C.