Japan Company produces lamps that require 3 standard hours per unit at a standard hourly rate of $12.20 per hour. Production of 5,000 units required 15,450 heurs at an hourly rate of $11:80 per hour. What is the direct labor (a) rate variance, (b) time variance, and (c) total cost varlance? Enter fovorable variances ar negative numbers. a. Direct labor rate variance b. Direct labor time variance c. Total direct labor cost variance