Contribution Margin by Segment The following data are for Moss Creek Apparel: East West Sales volume (units): Product XX 9,400 10,700 Product YY 5,500 9,800 Sales price: Product XX $24 $26 Product YY $29 $28 Variable cost per unit: Product XX $14 $14 Product YY $17 $17 a. Determine the contribution margin for Product YY. $fill in the blank 1 b. Determine the contribution margin for the West Region. $fill in the blank 2