Exercise 20.3 (Algo) computing required sales volume (LO20-4. LO2O-5 The following is information concerning a product manufactured by Ames Brothers Sales price per unit $63 variable cost per unit 43. Total fixed manufacturing and operating (per month) 410,000. a. Determine the unit contribution margin b. Determine the number of units that must be sold each month to break even (Round your number to the nearest whole number. c. Determine the units that must be sold to earn an operating income of 234,000 per month round your number to the nearest whole number