The records of  Aldrin Aviation include the following accounts for inventory of aviation fuel at July 31 of the current year.
 
 Inventory
 Aug 1 Balance 500 units @ $6.20  $3100
 Nov 5 Balance 500 units @ $6.80  $3400
 Jan 24 Purchase 7,500 units @ $7.00   $52,500
 Apr 8 Purchase 500 units @ 8.00          $4,000
 
 Sales Revenue
 Jul 31   8090 units    $113,260
 
 Requirements: Prepare a partial income statement through gross profit  under the average, FIFO and LIFO methods. Round average cost per unit to  four decimal places and all other amounts to the nearest whole dollar.