Contribution Margin by Segment The following information is for Cabin Craft Apparel: Sales volume (units): Product Alpha Product Omega Sales price: East West 7,600 7,300 4,600 8,600 Product Alpha $21 $19 Product Omega $24 $23 Variable cost per unit: Product Alpha Product Omega $13 $13 $14 $14 a. Determine the contribution margin for the East Region and West Region. East Region: $ West Region: b. Determine the contribution margin ratio for the East Region and West Region. Round the contribution margin ratio to one-tenth of a percent. East Region: West Region: % %