London Inc. has identified the following costs at different activity levels for electricity for their manufacturing plant:

Units Produced	Electricity Cost
1,000	$50,000
2,000	$97,400
3,000	$148,000
4,000	$192,500
5,000	$242,000

Management is uncertain on how to predict costs at different activity levels and thus has asked for some assistance. Using the high-low method, determine the variable component of the electricity cost.