Keisker Clinic uses client$-$visits as its measure of activity. During November, the clinic budgeted for $2,240$ client$-$visits, but its actual level of activity was $2,230$ client$-$visits. The clinic has provided the following data concerning the formulas used in its budgeting and its actual results for November:

Data used in budgeting:

$\backslash$table$[[,$Fixed element Variable element,$],[,$per month,per client$-$visit$],[$Revenue$,$$$0,$$$54\mathrm{.}50$