1. Given the cost behavior in the table below, which of the three costs is a variable cost?

   		Cost 1		Cost 2		Cost 3
   Month	Units Produced	Total Costs	Cost per Unit	Total Costs	Cost per Unit	Total Costs	Cost per Unit
   1	60	$150	$2.50	$250	$4.17	$200	$3.33
   2	90	250	$2.78	$250	$2.78	$300	$ 3.33

   		Cost 1
   		None of the three are variable costs
   		Cost 2
   		Cost 3