QUESTION 4 Not complete Points out of 6.00 PFlag question Direct Labor Variances Assume that Nortel manufactures specialty electronic circuitry through a unique photoelectronic process. One of the primary products, Model ZX40, has a standard labor time of 0.5 hour and a standard labor rate of $12.50 per hour. During February, the following activities pertaining to direct labor for ZX40 were recorded: Direct labor hours used Direct labor cost 2,180 E1,000 Units of ZX40 manufactured 4700 (a) Determine the labor rate variance. (b) Determine the labor efficiency variance. c) Determine the total flexible budget labor cost variance