ritory and Product Prolitablity Aralysis ast to Coast Surfboards inc, manufactures and selis two styles of surfbeards. Adantic Wave and Pacific Poundet. These seriboards are sold in two repions. East coast and West Coast. ne sales unit volume for the territeries and products for the period is as follows: a. Prepare a contribudon margin by sales territory report, Compute the contribution margin ratio for each territory as a whole percent, rounded to two decimal places, if required. Coast to coast Surfboards inc. Contribution Margin by Territory