calculate (a) the labor rate variance and (b) the labor effienciency variance. explain what each variance means for the company

A company produced 20,000 units of material using 20,800 direct labor hours at a total cost of $327,600. The standards for direct labor are 1 direct labor hour for every unit at an hourly rate of $16 per hour Calculate (a) the labor rate variance and (b) the labor efficiency variance. Explain what each variance means for the company. (Show and label all calculations)