The store owner provided the following information for 2017. Inventories as of 1 January $138 600 Purchases $716100 Inventories as of December 31 $149100 Standard gross margin of 30% Based on this information, what should be the store’s profit for 2017? A) $ 2 352 000 B)$ 1 038 000 C)$ 917 280 D)$ 1 008 000 In this question (138000+716100-149100)x100/70=1 008 000 Why there used 70 not 30?