The units of Manganese Plus available for sale during the year were as follows: Mar. 1 Inventory 20 units @ $32 $640 June 16 Purchase 27 units @ $32 864 Nov. 28 Purchase 42 units @ $36 1,512 89 units $3,016 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.