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 1,349 $ 102,703 2 715 1,405 103,833 3 680 1,514 109,895 4 735 1,443 108,232 5 775 1,596 116, 201 6 765 1,579 114,523 7 745 1,382 107,009 8 725 1,307 102,137 9 700 1,459 106,348 10 805 1,551 113,102 11 670 1,286 101,176 12 720 1,616 114,706 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