Swifty Corporation has a materials price standard of $2.00 per pound. 5100 pounds of materials were purchased at $2.20 a pound. The actual quantity of materials used was 5100 pounds, although the standard quantity allowed for the output was 4900 pounds. Swifty Corporation's materials price variance is O $1020 U. $1020 F. $980 U. O $40 U.