Provide an appropriate response.

The demand function for a manufacturer's product is$$p$=$f$($q$)=800-2$q$,$ where$$p$$is the price $($in dollars$)$ per unit when$$q$$units are demanded $($per week$).$ Find the level of production that maximizes the manufacturer's total revenue.

Question $9$ options:

$200$

$150$

$100$

$175$

$125$