Assume that the actual amount of one of a company's variable expenses was 545398. The company's planned level of activity was 19,000 machine-hours, and its actual level of activity was 18,675 machine-hours. The spending variance for this particular expense was $9,114 favorable. The cost formula per machine-hour for this expense is: Multiple Choice $1.93 $2.91 $2.85. $1.89