The following information is for Cabin Craft Apparel: Line Item Description East West Sales volume (units): Product Alpha 8,500 8,200 Product Omega 6,300 10,600 Sales price: Product Alpha $13 $11 Product Omega $18 $19 Variable cost per unit: Product Alpha $8 $8 Product Omega $11 $11 a. Determine the contribution margin for the East Region and West Region. East Region: fill in the blank 1 of 2$ West Region: fill in the blank 2 of 2$ 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: fill in the blank 1 of 2 % West Region: fill in the blank 2 of 2 %