The following information is available regarding the total manufacturing overhead of Olaf Company for a recent four-month period.

	Machine Hours		Mfg. Overhead
April	70,000		$	176,000
May	50,000		$	159,000
June	105,000		$	219,500
July	101,000		$	187,000

Using the high-low method, compute the variable element of manufacturing overhead cost per machine hour.

• $2.27 per machine hour

• $1.10 per machine hour

• $.35 per machine hour

• $1.24 per machine hour