The following information is available regarding the total manufacturing overhead of Bursa Mfg. Co. for a recent four-month period. January February March April Machine- Hours 5,600 3,200 4,900 2,500 Manufacturing Overhead $ 300,000 224,000 263,800 190,000 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.) 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? Manufacturing overhead cost per machine hour Fixed element of monthly overhead cost Estimated manufacturing overhead cost b. Amount February March Under estimated Over estimated