When prices are rising, the cost flow assumption that will generally produce the largest gross margin is: A. FIFO. B. weighted average. C. LIFO. D. specific identification. E. None of the above. Use the following data for the next three questions: San Inc., has an inventory for artist brushes on October 1 and purchases of this item during October as follows: During October, San sold 1,900 brushes at $10.00 each. Assume San uses a Periodic inventory System. 1. Determine the cost of the ending inventory based on the UFO method of inventory valuation. A. $3,900 B. $7,100 C. $10,900 D. $7,700 2. Determine the cost of ending inventory based on the flFO method of inventory valuation. A. $3,900 B. $7,100 C. $10,900 D. $7,700 3. Compute the gross marein for october based on the fifo method of inventory valuation. A. $15,100 B. $11,900 C. $11,300 D. 57,700