Standard Labor Variances A CPA firm estimates that an audit will require the following work:

Type of Auditor	Expected Hours			Cost per Hour			Standard Costs
Manager	10			$	50		$	500
Senior	20				40			800
Staff	40				30			1,200
Total	70						$	2,500

The actual hours and costs were:

Type of Auditor	Actual Hours			Actual Cost per Hour			Actual Costs
Manager	9			$	52		$	468
Senior	22				38			836
Staff	44				30			1,320
Total	75						$	2,624

Required: Calculate the direct labor, wage rate, and labor efficiency variances for each type of auditor and interpret.