The following information has been taken from the perpetual inventory system of Imperial Mfg. Co. for the month ended September 30:

Purchases of direct materials	$	85,000
Direct materials used	$	64,400
Direct labor costs assigned to production	$	26,000
Manufacturing overhead costs incurred	$	46,500

Balances in inventory	Sept 30			Sept 1
Materials	$	?			55,000
Work in Process	$	35,000			51,500
Finished Goods	$	62,000			67,000

The cost of goods sold in September is:

a $141,900.

b $158,400.

c Some other amount.

d $157,400.