Answer:
$52,000
Explanation:
Remember, the FIFO inventory costing method records the inventory value based on the cost of the earliest (first) purchased or in hand balance.
The effective tax rate would usually be applied after the sales, however using FIFO we assume the first value of the inventory prior to the tax deduction.
= 4000 x $13
= $52,000
Therefore, the gross profit for the period is $52,000.