The Reedy Company uses a standard costing system. The following data are available for November: Act

The Reedy Company uses a standard costing system. The following data are available for November:

      Actual direct labor-hours worked 6,200   hours   Standard direct labor rate $7.80   per hour   Labor rate variance $1,860 favorable

   The actual direct labor rate for November is: $8.10 $7.80 $7.65 $7.50

Please EXPLAIN your answer. I used two different formulas and got 8.1 as answer but it is NOT correct.