Reuer Midwifery's cost formula for its wages and salaries si $2,900 per month plus $475 per birth. For the month of March, the company planned for activity of 116 births, but the actual activity level of activity was 117 births. The actual wages and salaries for the month was 56,270. The activity variance for wages and salaries in March would be closest to: A) $1730U B) $475F C) $475U D) $1730F