Goldman, Inc. manufactures lead crystal glasses. The standard direct labor time is 0.5 hours per glass, at a cost of $16 per hour. The actual results for one month's production of 6531 glasses were 0.5 hours per glass, at a cost of $17 per hour Calculate the direct labor efficiency variance for the month. Your answer should be to two decimal places. An unfavorable variance should be entered as a negative number while a favorable variance should be entered as a positive number