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 1,550 2,080 1,170 Sales price per unit $1,220 $890 $3,140 Variable costs per unit $770 $360 $2,260 Calculate: Contribution margin per unit ($) Total Contribution margin ($) Contribution margin ratio (%)