The following information pertains to Mason Company for Year $2$:

Beginning inventory $128$ units @ $$36$

Units purchased $382$ units @ $$54$

Ending inventory consisted of $48$ units. Mason sold $462$ units at $$108$ each. All purchases and sales were made with cash. Operating expenses amounted to $$3,600.$

Exercise $5-4$A $($Algo$)$ Part a

Required

a$.$ Compute the gross margin for Mason Company using the following cost flow assumptions: $(1)$ FIFO, $(2)$ LIFO, and $(3)$ weighted average.