Contribution Margin by Segment The following information is for Moss Creek Apparel: a. Determine the contribution margin for the East Region and West Region. East Region: x West Region: : 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: x% West Region: % Feedback Check My Work for both products in each region. b. Recall that contribution margin ratio is defined as total contribution margin divided by total sales