Please help, DO NOT do it if you don't know it. Thanks.

Emerald Bazaar has a materials price standard of $2.00 per pound. Six thousand pounds of materials were purchased at $2.20 a pound. The actual quantity of materials used was 6,000 pounds, although the standard quantity allowed for the output was 5,400 pounds. Emerald Bazaar's total materials variance is 1) $2,520F 2) $2,520U. 3) $2,400F. 4) $2,400