Telnex Corporation maintains its internal inventory records using firstin firstout FIFO under a perpetual inventory system. The following information relates to its inventory during the year: January Beginning inventory units. February Purchased  units for $ each. April Sold  units for $ each.July Purchased  units for $ each.September Sold  units for $ each.November Purchased  units for $ each.December Ending inventory units.  Required:Determine the amount Telnex would calculate internally for ending inventory and cost of goods sold using firstin firstout FIFO under a perpetual inventory system. Beginning inventory under FIFO was  units with a cost of $ eachDetermine the amount Telnex would report externally for ending inventory and cost of goods sold using lastin firstout LIFO under a periodic inventory system. Beginning inventory under LIFO was  units with a cost of $ eachDetermine the amount Telnex would report for its LIFO reserve at the end of the year. To more efficiently manage its inventory,