1. The following information is available for a company's utility cost for operating its machines over the last four months.

   Month	Machine hours		Utility cost
   January	1030		$	5580
   February	1930		$	7160
   March	2660		$	9400
   April	730		$	3610

   Using the high-low method, the estimated total fixed cost for utilities is:

   		$1630.
   		$3690.
   		$1420.
   		$3610.
   		$6130.