Bean Inc. uses a perpetual inventory system. The company's beginning inventory of a particular product and its purchases during the month of November were as follows: Nov 1 balance 200 units at S40 each Nov 15 Purchase 300 units at total cost of $13 500 Nov 27 Purchase 120 units at total cost of $5760 On Nov 18, Bean Inc. sold 520 units of this product. Calculate the ending inventory balance at Nov 30 assuming Bcan uses: a. LIFO cost flow assumption b. Average cost flow assumption c. FIFO cost flow assumption