Adriana Corporation manufactures football equipment. In planning for next year, the managers want to understand the relation between activity and overhead costs. Discussions with the plant supervisor suggest that overhead seems to vary with labor-hours, machine-hours, or both. The following data were collected from last year's operations. Month Labor-Hours Machine-Hours Overhead Costs 1 730 1,352 $ 102,686 2 720 1,400 103, 705 3 680 1,529 109,886 4 740 1,447 108,257 5 775 1,587 116,254 6 750 1,575 114,492 7 750 1,386 106,989 8 730 1,314 102,054 9 9 715 1,448 106,308 10 800 1,546 113,078 11 670 1,298 98,964 12 705 1,604 110,592 Required: a. Use the high-low method to estimate the fixed and variable portions of overhead costs based on machine-hours. b. Managers expect the plant to operate at a monthly average of 1,600 machine-hours next year. What are the estimated monthly overhead costs, assuming no inflation? Complete this question by entering your answers in the tabs below. Required A Required B costs on machine-hours. (Round Use the high-low method to estimate the fixed and variable portions of ove "Variable cost" answer to 2 decimal places.) Variable cost (per machine hour) Fixed cost Complete this question by entering your answers in the tabs below. Required A Required B Managers expect the plant to operate at a monthly average of 1,600 machine-hours next year. What are the estimated monthly overhead costs, assuming no inflation? Overhead costs