Complete the table below for contribution margin per unit, total contribution margin, and contribution margin ratio: (Round your answers to two decimal places when needed and use rounded answers for all future calculations). Units A B C Number of units 1,420 2,140 1,190 Sales price per unit $1,110 $810 $3,180 Variable costs per unit $770 $320 $2,190 Calculate: Contribution margin per unit ($) Total Contribution margin ($) Contribution margin ratio (%)