Japan Company produces lamps that require 3 standard hours per unit at an hourly rate of $15.60 per hour. Production of 4,300 units required 12,510 hours at an hourly rate of $15. 10 per hour. Enter favorable variances as negative numbers. (a) Determine the direct labor rate variance. (b) Determine the direct labor time variance. X Favorable Favorable (c) Determine the cost variance. Favorable