A company has provided the following fixed and variable cost estimates that it uses for budgeting purposes. Revenue Wages expense Materials expense Other expenses Fixed Cost per Month Variable Cost per Unit Serviced $4,800 $40,200 $1,100 $700 $29,600 When the company prepared its planning budget at the beginning of November, it assumed that 28 units would be serviced, however the actual number of units serviced in November was 26. Actual revenue during November was $131,500. The revenue activity variance is: $6,700F. $9,600F. $9,600U. $2,900U.