From the following particulars furnished by AT&T Co. Ltd., find out the: Material Cost Variance, I. II. Material Usage Variance, and III. Material Price Variance. Material Purchased Price of Materials Purchased Standard quantity of materials required per tonne of FP(finished product) Standard Rate of Material Opening Stock of Material Closing Stock of Material Finished products during the period 3000 units Rs. 12,000 25 units Rs. 2 per unit Nil 500 units 80 tonnes