Department G had 3,600 units 25% completed at the beginning of the period, 11,000 units were completed during the period; 3,000 units were 20% completed at the end of the period, and the following manufacturing costs debited to the departmental work in process account during the period:

Work in process, beginning of period	$40,000
Costs added during period:
Direct materials (10,400 units at $8)	83,200
Direct labor	63,000
Factory overhead	25,000

19. All direct materials are placed in process at the beginning of production and the first-in, first-out method of inventory costing is used. The total cost of the units started and completed during the period (round unit cost calculations to four decimal places) is

	a.	$211,200
	b.	$120,060
	c.	$190,275
	d.	$20,934

ANSWER IS B, $120,060 BUT WHY? EXPLAIN