Venneman Company produces a product that requires 7 standard pounds per unit. The standard price is $11.50 per pound. If 3,900 units required 28,400 pounds, which were purchased at $10.92 per pound, what is the direct materials (a) price variance, (b) quantity variance, and (c) total direct materials cost variance? Enter a favorable variance as a negative number using a minus sign and an unfavorable variance as a positive number