The Shirt Shop had the following transactions for T$-$shirts for Year $1,$ its first year of operations.

January $20$ Purchased $440$ units @ $ $8=$ $$3,520$

April $21$ Purchased $240$ units @ $$10=2,400$

July $25$ Purchased $320$ units @ $$13=4,160$

September $19$ Purchased $130$ units @ $$15=1,950$

During the year, The Shirt Shop sold $930$ T$-$shirts for $$24$ each.

c$.$ Compute the difference in gross margin between the FIFO and LIFO cost flow assumptions.