Use the functions given below to solve the problem. C(x) represents the cost, in dollars, of x units of a product and R(x) represents the revenue, in dollars, from the sale of x units. Find the number of units that must be produced and sold in order to break even C(x) = 28,000 +42x and R(x) = 44% The number of units that must be produced and sold in order to break even is units