The following information is available pertaining to the Production Division of Clarkson Enterprises:

	Assembly Dept.	Finishing Dept.	Total
Overhead costs	$7,500	$22,500	$30,000
Direct labor hours	7,500	2,500	10,000
Machine hours	2,500	7,500	10,000
Production information pertaining to Job 4X5:
	Assembly Dept.	Finishing Dept.	Total
Prime costs	$1,250	$0	$1,250
Direct labor hours	250	0	250
Machine hours	0	0	0
Units produced	500	0	500

What is the plantwide overhead rate based on direct labor hours?

a.$3.00

b.$1.50

c.$9.00

d.$1.00