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 1,354 $ 102,734 2 720 1,408 103,782 3 680 1,525 109,856 4 735 1,459 108,296 5 775 1,600 116,228 6 745 1,569 114,549 7 745 1,399 107,085 8 725 1,301 102,129 9 715 1,455 106,311 10 800 1,553 113,026 11 670 1,286 98,493 12 705 1,606 110,653 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 1,500 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 Use the high-low method to estimate the fixed and variable portions of overhead costs based on machine-hours. (Round "Variable cost" answer to 2 decimal places.)