Varriano Corporation bases its budgets on the activity measure customers served. During October, the company planned to serve 31,000 customers, but actually served 34,000 customers. The company has provided the following data concerning the formulas it uses in its budgeting: Fixed element per month Variable element per customer Revenue $0 $ 3.60 Wages and salaries $ 35,100 $1.00 Supplies $0 $ 0.80 Insurance $8,700 $ 0.00 Miscellaneous expense $ 4,700 $ 0.10 Required: Prepare a report showing the company's activity variances for October. Indicate in each case whether variance is favorable (F) or unfavorable (U)