Direct materials purchases equal 20,000 pounds. Direct material usage is equal to 18,000 pounds. The standard price is $5 per pound and the actual price per pound is $4 per pound. The standard quantity of materials given what was produced this period is 16,000 pounds. What is the dollar amount of the materials efficiency variance and is the variance is favorable (F) or unfavorable (U)?

		$10,000 F
		$10,000 U
		$20,000 F
		$20,000 U