<u>ANSWER</u>
The subscription price of $45 provides the maximum revenue for the company
<u>EXPLANATION</u>
When the price is $
, the company sells
quantities.
The total revenue accrued


When the price increases to $
the quantity sold will decrease by 200 magazines which is 
The total revenue accrued

dollars
When the price increases to $
the quantity sold will decrease by 200 magazines again which is 
The total revenue accrued

dollars
When the price increases to $
the quantity sold will decrease by 200 magazines which is 
The total revenue accrued

dollars
Hence a subscription price of $45 provides the maximum revenue for the company.