The following is information concerning a product manufactured by Ames Brothers: 420,000 Determine the unit contribution margin. -Unit Contribution Margin= Determine the number of units that must be sold each month to break even. (Round your answer to the nearest whole number.) -Break Even Units= Determine the number of units that must be sold to earn an operating income of $234,000 per month. (Round your answer to the nearest whole number.) -Taget Sales in Units= Solution a)Unit Contribution = Sale price p.u. .