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Which one of the following is correct about variable costing systems? Select one a. Calculate product cost as the sum of directs materials, direct labor, manufacturing overhead costs, and selling cost b. Focuses on both variable and fixed costs OC.Calculate product cost as the sum of directs materials, direct labor and manufacturing overhead costs d. Normally result into a lower product cost compared to absorption costing systems A typical job-cost sheet would provide information about all the following items related to an order except: Select one a. the cost of direct materials used. b. administrative costs. C applied manufacturing overhead d. direct labor costs incurred, Time left 0:34:31