A department store sells two types of televisions: Regular and Big Screen. The store can sell up to $90$ sets a month. A Regular television requires $6$ cubic feet of storage space, and a Big Screen television requires $18$ cubic feet of space, and a maximum of $1080$ cubic feet of storage space is available. The Regular and Big Screen televisions take up$,$ respectively, $2$ and $3$ sales hours of labor, and a maximum of $198$ hours of labor is available. If the profit made from each of these types are $\backslash (\backslash$$ $60\backslash )$ and $\backslash (\backslash$$ $80\backslash ),$ respectively, how many of each type of television should be sold to maximize profit, and what is the maximum profit? Which of the following is the correct objective function