The following standards have been established for a raw material used in the production of product The following data pertain to a recent month's operations: (a) the company produced 2.040 units of product 613 during the month. (b) Purchased 5, 100 liters of materials at a total cont of $100, 725. (c) Used 4, 700 liters of materials in production. (d) Worked 2, 100 direct labour hours at a total cost of 523, 385. Required: (1) Calculate the materials price variance. (2) Calculate the materials quantity variance. (3) Calculate the labour rate and labour efficiency variance