The owner of an ice cream franchise must pay the parent company $2800 per month plus 5% of the monthly revenue R. Operating cost of the franchise includes a fixed cost of $3500 per month for items such as utilities and labor. The cost of ice cream and supplies is 55% of the revenue. (a) Express the owner's monthly expense E in terms of R (b) Express the monthly profit in terms of R (c) Determine the monthly revenue needed to break even