The following transactions relates to the record of Rocks Hair Supplies for the six months ended June 30, 2010. There was an opening balance of 100 units which had a value of $5000. c. From the information given above use the following inventory valuation methods: i. FIFO ii. LIFO iii. AVCO d. Prepare in columnar format, the trading account for the period, showing the gross profit, using the LIFO, FIFO, and AVCO methods valuing closing inventory