The following information is for Elm Leaf Apparel: Sales volume (units); Product Alpha Product Omega Sales price: Product Alpha Product Omega Variable cost per unit: Product Alpha Product Omega X Eneo East West $8 $10 a. Determine the contribution margin for the East Region and West Region. East Region: $ X West Region: $ 7,900 7,900 2,500 4,000 X% $13 $12 $16 $14 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: X% West Region: $8 $10