McBiley Publishers produces textbooks for colleges and universities. The standard direct labour quantity per textbook is 0.5 direct labour hours and the standard direct labour rate is $14 per hour. Last month, 150,000 textbooks were produced and 73,500 actual direct labour hours were used. The company's direct labour payroll for last month was $977,550. What was the total direct labour variance?

O $72,450 F.

O $21,000 F.

O $51.450 F.

O $71,001 F.