Storkin Enterprises Recently Used 24,000 Labor Hours to Produce 8,600

Storkin Enterprises recently used 24,000 labor hours to produce 8,600 completed units. According to manufacturing specifications, each unit is anticipated to take 2.75 hours to complete. The company's actual payroll cost amounted to $456,000. If the standard labor cost per hour is $19.20, Storkin's labor rate variance is:

A) $1,920U.
B) $1,920F.
C) $4,800U.
D) $4,800F.
E) None of the answers is correct.