The management of Wheeler Company has decided to develop cost formulas for its major overhead activities. Wheeler uses a highly automated manufacturing process, and power costs are a significant manufacturing cost. Cost analysts have decided that power costs are mixed. The costs must be broken into their fixed and variable elements so that the cost behavior of the power usage activity can be properly described. Machine hours have been selected as the activity driver for power costs. The following data for the past 8 quarters have been collected:

Quarter		Machine Hours	Power Cost
1		20,000			$26,000
2		25,000			38,000
3		30,000			42,500
4		22,000			37,000
5		21,000			34,000
6		18,000			29,000
7		24,000			36,000
8		28,000			40,000

Note: For the following requirements, round the fixed cost to the nearest dollar, round the variable rates to three decimal places, and the R² to two decimal places.

1. Using the high and low points (i.e., the high-low method), compute a power cost formula. (Note: Round variable rate to three decimal places.)

Total power cost = $_________ + ( __________ x Number of machine hours )

2. Use the method of least squares to compute a power cost formula. Evaluate the coefficient of determination.

Variable rate (to two decimal places)	$_________ per machine hour
Fixed cost (to the nearest dollar)	$_________
Coefficient of determination (R2) (to one decimal place)	________%