McLean Company produces a product that requires two standard hours per unit at a standard hourly rate

Question:

McLean Company produces a product that requires two standard hours per unit at a standard hourly rate of $18 per hour. If 2,500 units required 5,500 hours at an hourly rate of $19 per hour, what is the direct labor
(a) Rate variance,
(b) Time variance, and
(c) Cost variance?