10-25 Account analysis, high-low. Stein Corporation wants to find an equation to estimate some of their monthly operating costs for the operating budget for 2018. The following cost and other data were gathered for 2017: Maintenance Machine Health Number of Shipping Units Month January February March April Costs $4,500 $4,452 $4,600 $4,850 $5,166 $4,760 $4,910 $4,960 $5,070 $5,250 $5,271 $4,760 Hours Insurance Employees CostsShipped 68 75 92 $25,776 7,160 8,240 7,965 $23,058 6405 $21,2945,915 9,245 8,730 8,415 6,975 7,185 5,590 $34,596 9,610 $8,600 $8,600 165 $29,664 $28,674 230 318 460 280 340 $8,600 $8,600 $8,600 $8,600 $8,600 $8,600 $8,600 $8,600 89 87 93 August September October November December $33,282 $31,428 $30,294 $25,110 $25,866 $20,124 95 102 97 495 275 Which of the preceding costs is variable? Fixed? Mixed? Explain. 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 Corporation. Next month, Stein expects to use 400 machine hours, have 80 employees, and ship 9,000 units. Estimate the total operating cost for the month. 1. 2. 3. 4