Maintenance Machine Health Number of Shipping Units Hours Insurance Employees C Costs Shipped Month January February March April May June Costs $4,500 $4,452 $4,600 $4,850 $5,166 $4,760 $4,910 $4,960 $5,070 $5,250 $8,600 $8,600 $8,600 $8,600 $8,600 $8,600 $8,600 $8,600 $8,600 $8,600 $8,600 $8,600 68 75 92 105 89 87 93 $25,776 7,160 $29,664 8240 $28,674 7,965 $23,058 6,405 $21,294 5,915 $33,282 9,245 $31,428 8,730 $30,294 8,415 $25,110 6,975 $25,866 7,185 $20,124 5,590 165 230 318 460 280 340 360 420 495 510 275 August September October November December 95 102 97 94 $4,760 34,596 9,610 1. Which of the preceding costs is variable? Fixed? Mixed? Explain. 2. Using the high-low method, determine the cost function for each cost. Combine the preceding information to get a monthly operating cost function for the Stein Corporaton. the total operating cost for the month 4. Next month, Stein expects to use 400 machine hours, have 80 employees, and ship 9,000 units. Estim