The Hotel Kranson has 550 rooms. Currently the hotel is filled . The daily rental is $ 200 per room.
For every $ 20 increase in rent the demand for rooms decreases by 3 rooms.
Let x = the number of $ 20 increases that can be made.

What should x be so as to maximize the revenue of the hotel ?

What is the rent per room when the revenue is maximized? $

What is the maximum revenue? $

Can someone please help me?

Question

The Hotel Kranson has 550 rooms. Currently the hotel is filled . The daily rental is $ 200 per room. 
For every $ 20 increase in rent the demand for rooms decreases by 3 rooms. 
Let x = the number of $ 20 increases that can be made. 

What should x be so as to maximize the revenue of the hotel ?  

What is the rent per room when the revenue is maximized? $  

What is the maximum revenue? $

Can someone please help me?