The units of Manganese Plus available for sale during the year were as follows: Mar. 1 June 16 Nov. 28 Inventory Purchase Purchase 20 units 28 units 39 units @ $29 @ $32 @ $37 $580 8 96 1,443 87 units $2,919 There are 16 units of the product in the physical inventory at November 30. The periodic inventory system is used. Determine the difference in gross profit between the LIFO and FIFO inventory cost systems. Enter the answer as a positive number. FIFO Cost of Goods Sold LIFO Cost of Goods Sold Difference