Bonita Industries has a materials price standard of $$3$ per pound. $6800$ pounds of materials were purchased at $$3\mathrm{.}2$ a pound. The actual quantity of materials used was $6800$ pounds while the standard quantity allowed for the output was $4200$ pounds.

Bonita Industries's total materials variance is

$$9160F.$

$$9160U.$

$$9680U.$

$$9680F.$