Folklore Industries Ltd. manufactures old-fashioned pianos. During the month of February there was a fire in the factory and warehouse, and some of Folklore's financial records were destroyed. The accountant was able to retrieve the following information: Direct materials purchased during the month totalled exist320,000. According to a note left by warehouse staff, the amount of direct materials inventory at the warehouse just before the fire started had decreased by exist3,000 from the inventory at the beginning of the month. The payroll records showed direct labour cost for February was exist575,000. The total manufacturing costs for February were exist1, 588,000. The ending work-in-process inventory was exist150,000. No other information was found. What were total manufacturing overhead costs for the month of February? a) exist690,000 b) exist693,000 c) exist696,000 d) exist840,000