Trey Monson starts a merchandising business on December $1$ and enters into the following three inventory purchases.

Monson uses a perpetual inventory system. Also, on December $15,$ Monson sells $28$ units for $$50$ each.

QS $5-11($Algo$)$ Perpetual: Assigning costs with FIFO LO P$1$

Required:

Determine the costs assigned to the December $31$ ending inventory based on the FIFO method.