Figure 3-5. Maxwell Company makes treadmills. The company controller wants to calculate the fixed and variable costs associated with the janitorial costs incurred in the factory. Data for the past four months were collected Month September October November December Janitorial Machine costs hours $11.000 575 11.400 10.200510 10.725 550 610 Refer to Figure 3-5. What would Maxwell Company's estimate of total janitorial cost be at a level of 600 machine hours? O $11,280 $7,500 $4,080 $6,120 4.5 points Save Answer QUESTION 12 If output decreases total fixed costs will remain the same. total variable costs will increase. O per-unit fixed costs will decrease. All of these are correct. 4.5 points Save Answer QUESTION 13 Knowing how costs change as output changes is essential O O planning and controlling controlling and decision making planning controlling and decision making. None of these are correct