A standard cost card reveals that one unit of Product A needs 2 kg of material X at Rs 10 per kg. During February 800 units of Product A were produced. Actual price paid for material X is Rs 9 per kg and total cost Rs 15,300. Determine material cost variance. O a. Rs 700 favorable O b. Rs 700 unfavorable Oc. Inadequate data Od. None of the options are correct