A company's inventories and purchases information for January 2020 is as follows: N$ Opening inventories 1 January 2020 10,000 Purchases 72,000 15,000 Closing inventories 31 January 2020 What is the cost of inventory sold in January 2020? Select one: O a. N$72,000 O b. N$67,000 O c. None of the above 0 d. N$87,000 O e. N$77,000