The following information is available regarding the total manufacturing overhead of Bursa Mfg. Co. for a recent four-month period:

	Machine-Hours		Manufacturing Overhead
Jan.	5,800		$	300,000
Feb.	3,200			224,000
Mar.	4,900			263,800
Apr.	2,800			190,000

a-1	Use the high-low method to determine the variable element of manufacturing overhead costs per machine-hour. (Round your answer to 2 decimal places. Omit the "$" sign in your response.)

Manufacturing overhead cost

$

per machine hour

a-2

Use the high-low method to determine the fixed element of monthly overhead cost. Hint: Due to the algorithmic nature of this problem, you must use the 'high' figures to obtain the correct answer. If we were using unrounded numbers on a standard problem, the fixed element could be obtained by using either the 'high' or the 'low' figures. (Round your intermediate calculations to 2 decimal places. Omit the "$" sign in your response.)

Fixed element of manufacturing overhead

$

b.	Bursa expects machine-hours in May to equal 5,300. Use the cost relationships determined in part a to forecast May's manufacturing overhead costs. (Round your intermediate calculations to 2 decimal places. Omit the "$" sign in your response.)

Estimated manufacturing overhead

$

c.

Suppose Bursa had used the cost relationships determined in part a to estimate the total manufacturing overhead expected for the months of February and March. By what amounts would Bursa have over- or underestimated these costs? (Negative amounts should be indicated by a minus sign. Round your intermediate calculations to 2 decimal places. Omit the "$" sign in your response.)

Amount over (under) estimated
February	$
March	$