James Company manufactures t-shirts. During the year, it manufactured 250,000 t-shirts, using 2 hours of direct labor at a rate of $8.50 per hour. The materials and labor standards for manufacturing the t-shirts are:

Direct materials (6 yards of fabric @ $3 per yard)	$18
Direct labor (2.4 hours @ $8.00 per hour)	17

It took James 1,400,000 yards at $2.50 per yard to make the 250,000 t-shirts. What is James' labor efficiency variance?

a.$850,000 F

b.$800,000 F

c.$800,000 U

d.$850,000 U