Use the Following Information for the Next 7 Questions

Multiple Choice

Use the following information for the next 7 questions.
A small accounting firm budgets 200 hours of billings for the next month, and 60% of these hours are expected to be for tax return preparation services, with the remaining 40% for bookkeeping services. Tax work is billed at $50 per hour, and bookkeeping work is billed at $40 per hour. The variable costs for both types of services are $10 per hour. During the month 180 hours were billed, 90 of which were for tax work.
-(Appendix 11A) The contribution margin sales quantity variance was

A) $720 unfavorable
B) $540 favorable
C) $0
D) $1,200 favorable