K Suppose that the revenue R, in dollars, from selling x cell phones, in hundreds, is R(x) = -1.8x + 220x. The cost C in dollars, from selling x cell phones, in hundreds, is C(x)=0.06x-3x+60x+550. (a) Find the profit function, P(x) = R(x) - C(x). (b) Find the profit if x = 19 hundred cell phones are sold. (c) Interpret P(19) (a) P(x)= (Use integers or decimals for any numbers in the expression.) (b) P(19)=$ (Type an integer or a decimal. Round to the nearest cent.) (c) Interpret P(19). Choose the correct answer below. A. When 19 hundred cell phones are sold, the profit is given by P(19). B. When 19 hundred cell phones are sold, the cost is given by P(19). OC. When 19 hundred cell phones are sold, the revenue is given by P(19)