The following data relate to direct labor costs for March: Rate: standard, $12.00; actual, $12.25 Hours: standard, 18,500; actual, 17,955 Units of production: 9,450 Calculate the total direct labor variance. Oa. $2,362.50 unfavorable Ob. $2,051.25 favorable Oc. $2,362.50 favorable Od. $2,051.25 unfavorable