how do you calculate material variances, material price variances, material quality variances? Calculate labor variances, labor rate variance, and labor efficiency variance? I would like to know these formulas and how to solve.

Actual Total Cost of Direct Materials	$ 225,000
Standard Total Cost of Direct Materials	$ 224,800
Actual Materials Used	30
Standard Materials Used	31
Actual Direct Labor Rate	$ 15.50
Standard Labor Rate	$ 15.00
Actual Hours Worked	45
Standard Hours Worked	40
	Amount	Favorable/ Unfavorable
Calculate Materials Variances:
Materials Price Variance	$
Materials Quantity Variance	$	F
Calculate Labor Variances:
Labor Rate Variance	$
Labor Efficiency Variance	$