Contribution Margin by Segment The following information is for Flat Bed Apparel: a. Determine the contribution margin for the East Region and West Region. East Region: West Region: $ X X 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: Foedtack v Check My Wark a. Recall that contribution margin is defined as sales less variable cost. We need to find the total contribution margin for each region and each region sells both products. Therefore, we need to find the total sales, variable cost and contribution margin for both products in each region. b. Recall that contribution margin ratio is defined as total contribution margin divided by total sales