Question 6 (4 points) Caterpillar has a materials price standard of $6,00 per pound and a standard quantity of .80 pounds per unit. 4,000 pounds of materials were purchased for $24.400, and all 4,000 pounds were used to make 4,000 units of product. Caterpillar's materials quantity variance is $400 F. O $4,800 F. O$400 U. $4,800 U