If the price charged for a candy bar is $p(x)$ cents, then $x$ thousand candy bars will be sold in a certain city, where

$p(x)=161-\frac{x}{10}$

a$.$ Find an expression for the total revenue from the sale of $x$ thousand candy bars.

b$.$ Find the value of $x$ that leads to maximum revenue.

c$.$ Find the maximum revenue.

a$.R(x)=$

b$.$ The $x-$value that leads to the maximum revenue is

c$.$ The maximum revenue, in dollars, is $