Profit is the difference between revenue and cost. The revenue, in dollars, of a company that manufactures cell phones can be modeled by the polynomial 2 x squared plus 55 x plus 10 The cost, in dollars, of producing the cell phones can be modeled by 2 x squared minus 15 x minus 40 The variable x represents the number of cell phones sold. What expression represents the profit, and what is the profit if 240 cell phones are sold?