BUCOLIO Bonita Company has a materials price standard of $2.50 per kilogram. 3940 kilograms of materials were purchased at $2.30 a kilogram. The actual quantity of materials used was 3470 kilograms, although the standard quantity allowed for the output was 3370 kilograms. Bonita Company's materials price variance for materials purchased is $788 u. $788 F. O $694 U. O $688 F