Domin Corporation bases its budgets on the activity measure customers served. During April, the company planned to serve 31,000 customers, but actually served 35,000 customers. Revenue is $4.80 per customer served. Wages and salaries are $33,000 per month plus $1.60 per customer served. Supplies are $1.00 per customer served. Insurance is $12,200 per month. Miscellaneous expenses are $7,400 per month plus $0.20 per customer served. Required: Prepare a report showing the company's activity variances for April. Indicate in each case whether the variance is favorable (F) or unfavorable (U)