The standard direct material cost per unit for Willis Group was $180 (= $45 per gallon x 4 gallons per unit). During the period, actual direct materials costs amounted to $2,406,390, materials used totaled 55,510 gallons, and 13,340 units were produced. Required: Compute the direct materials price and efficiency variances for the period. Note: Indicate the effect of each varlance by selecting "F" for favorable, or "U" for unfavorable. If there is no effect, do not select elther option. Answer is complete but not entirely correct. Price variance $ 91,591 Efficiency variance $ 96,750 U