The units of Manganese Plus available for sale during the year were as follows: Inventory 25 units $31 5775 June 16 Purchase 29 units 532 928 Nov. 28 Purchase 43 units 535 1,505 97 units $3.208 There are 34 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