Purchases Date Units Unit Cost Sales Units Average cost for each unit FIFO MOVING-AVERAGE LIFO Solution average unit costs: July 1 - 120 July 6 -120 July 11- 134 July 14 - 134 july 21- 142.6 July- 142.6 ending value of inventory under FIFO= $23,040 moving average= $30,660 LIFO= $23,384 .