Find the revenue function, TR. TR= (Type an expression using x as the variable. Do not include the $ symbol in your answer.) Find the cost function, TC. TC= (Type an expression using x as the variable. Do not include the $ symbol in your answer.) Compute the break-even point in units. The break-even point is units. (Round up to the nearest whole number.) Find the break-even point in sales dollars. The break-even point in sales dollars is S. (Round the final answer to the nearest cent as needed. Round all intermediate values to six decimal places as needed.) Graph the break-even chart. Choose the correct graph below. A. B. C. Number of products Number af pratiucts Number uf prationst