Class - What are the major limitations of Variable costings? Explain how contribution margin analysis is useful for managerial decisions and performance evaluations. Requirement: Your initial post must be more than 250 words and is due by Wednesday. You must use atleast one scholarly resource, cited with parenthetical APA style citations in the body of your post, and referenced at the bottom of your post with APA style references. You must respond to a minimum of TWO of your classmates with substantial comments that work to encourage additional discussion. You must be active in the discussion on a least three different days and during the weeks