Concord Family Instruments makes cellos. During the past year, the company made 6,390 cellos even though the budget planned for only 5,560. The company paid its workers an average of $20 per hour, which was $0.50 higher than the standard labor rate. The production manager budgets 4 direct labor hours per cello. During the year, a total of 24,900 direct labor hours were worked. (a) Calculate the direct labor rate and efficiency variances. (If variance is zero, select "Not Applicable" and enter O for the amounts.) Direct labor rate variance $ Direct labor efficiency variance $