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

Machine-Hours Manufacturing Overhead

January5,600 $310,000

February3,200 224,000

March4,900 263,800

April2,500 180,000

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 partato 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?