Moon Karak selis tea. The average selling price of a cup is OMR 0.400 and the average variable expense per cup is OMR 0.150. The average fixed expense per month is OMR 500. An average of 3,100 cups are sold each month. Contribution margin ratio for Moon Karak is closest to: Select one: a. None of the answers given b. 66.7% c. 62.5% d. 25.0% me. 70.0%