The mairtenance costs at one tactory of the Tetrechionide Corporation are listed below Machine-Hours Maintenance Cost anuary February March April May 3,613 3,607 3,614 3,638 3,604 3,653 3,634 3,588 552,986 52,580 552,504 52,585 52,825 52,500 552,943 52,776 52,337 August September method to estimate the veriable and feed conponents of this cost, these estimates would be cltto O5H 54 per machine-hour: $52.67 per month O $827 per mechinehour: $15076 per mosth Os0m per machine-hour $52.59t per mont O $9.27 per mechine-hour: $13 071 per moth