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.	5,100		$ 310,000
Feb.	3,200		224,000
Mar.	4,900		263,800
Apr.	3,000		180,000

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.)

A-2: Use the high-low method to determine the fixed element of monthly overhead cost.

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.

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?