Farr Company had the following information:

Revenues			400,000
Cost of goods sold:
	Direct materials	100,000
	Direct labour	50,000
	Overhead	50,000	200,000
Gross profit			200,000
Selling and administrative expenses		75,000
Operating income			125,000

What is the markup based on prime costs?

a.

133.3%

b.

300.0%

c.

166.7%

d.

50.0%