21 22 and 23 are all same problem

Dillon has a standard of 2 hours of labor per unit, at $12 per hour. In producing 2,000 units. Dillon used 3,850 hours of labor at a total cost of $46,970. 21. Dillon's labor rate variance is A) $770 U. B) $800 U. C) $1.030 F. D) $1,930 F. 22. Dillon's labor efficiency variance is A) $770 U. B) $770 F. C) $1,800 F. D) $1,930 F. 23. Dillon's total labor variance is A) $1,030 U. B) $800 U. C) $ 1.030 F. D) SI,930F