A company that produces a single product had a net operating income of $93,000 using variable costing and a net operating income of $132,440 using absorption costing. Total fixed manufacturing overhead was $60,180 and production was 11,800 units. This year was the first year of operations. Between the beginning and the end of the year, the inventory level: increased by 39,440 units decreased by 39,440 units decreased by 7,733 units increased by 7,733 units