A company has determined that the standard for labor is 2 hours per unit at $10 per hour. If a process produces 1,000 units and uses 2.2 hours at $9 per hour, the labor efficiency variance is:

Select one (from the options below):

a. $2,000 unfavorable

b. $2,000 favorable

c. $2,100 favorable

d. $2,100 unfavorable