Newbill Enterprises recently used 26,000 labor hours to produce 9,700 completed units. According to manufacturing specifications, each unit is anticipated to take 2.65 hours to complete. The company's actual payroll cost amounted to $504,400. If the standard labor cost per hour is $19.60, Newbill's labor rate variance is:

a.) $582U.

b.) $5,000F.

c.) $582F.

d.) $5,200U.

e.) $5,200F.

f.) None of these.