7 QS 23-11 (Algo) Product contribution margin analysis LO P3 Estela Company produces skateboards and scooters. Their per unit selling prices and variable costs follow. Skateboards require 2 machine hours per unit. Scooters require 3 machine hours per unit. P ferences Selling price per unit Variable costs per unit Skateboards 268 Scooters $502 154 361 (a) Compute the contribution margin per unit (b) Compute the contribution margin per machine hour. (a) Contribution margin per unt (b) Contribution margin per machine hour Skateboards Scooters Check my work