Moon company has an average selling price of OMR 20 per unit and an average variable cost of OMR 13 per unit. Current month's operating income is OMR 150,000. During the next month, the sales is expected to decrease by 1,000 units. What is the expected operating income for the next month? Select one: a. OMR 157,000 O b. OMR 139,500 c. OMR 143,000 d. None of the answers given e. OMR 136,000