15 units at 11 each + 9 units at 9 each . since lifo when we sell 12 we would sell 9 from the july 19 purchase and 3 from our previous inventory only leaving 12 at 11 each. then wehn we purchase 14 units in august they are going to sell fully in september 1 leaving 7 that would be sold form the remaining 12 of our bigining inventory, leaving 5 of our begingin inventory at a price of 11 each. lastly wehn we buy 15 units at 12. this would leave a value for the ending inventory of 5 at 11 and 5X12