The units of Manganese Plus available for sale during the year were as follows: Mar. 1 Inventory 25 units @ $31 $775 June 16 Purchase 28 units @ $30 840 Nov. 28 Purchase 38 units @ $38 1,444 91 units $3,059 There are 17 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