complete the table below for contribution margin per unit, total contribution margin, and contribution margin ratio. scenario A is: number of units 1290, sale price per unit 1,400, variable costs per unit 700. Scenario B is: number of units 14,920, sale price 4,500, variable costs per unit 3,600. Scenarios C: number of units 4,620, sale price per unit 5,550, variable costs per unit 1,665. complete the scenarios by entering the contribution margin per unit, Total contribution margin, and contribution margin ratio.