Contribution Margin by Segment The following information is for Moss Creek Apparel: Sales volume (units): Product Alpha Product Omega Sales price: East West 9,500 9,500 5,800 9,000 Product Alpha $17 $16 Product Omega $23 $21 Variable cost per unit: Product Alpha Product Omega $10 $10 $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: % %