A company uses the weighted average method for inventory costing. During a period, a production department had 36,000 units in beginning goods in process inventory which were 48% complete; the department completed and transferred 173,000 units. At the end of the period, 30,000 units were in the ending goods in process inventory and are 83% complete. All of these are with respect to labor. The production department had labor costs in the beginning goods is process inventory of $107,000 and total labor costs added during the period are $727,025. Compute the equivalent cost per unit for labor.

$3.85.

$4.21.

$4.06.

$4.42.

$4.27.