48 Assume that the actual amount of one of a company's variable expenses was $45,198. The company's planned level of activity was 19,000 machine-hours, and its actual level of activity was 18,500 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 $1.92. $2.94. $2.88. $1.96.