QUESTION 10 A company manufactures a single product for which the standard variable cost is: per unit Direct material: 81 kg _ 7 per kg 567 Direct labour: 97 hours _ 8 per hour 776 Variable overhead: 97 hours _ 3 per hour 291 1,634 During January, 530 units were produced and the costs incurred were as follows: Direct material: 42,845 kg purchased and used; cost 308,484 Direct labour: 51,380 hours worked; cost 400,764 Variable overhead: cost 156,709 You are required to calculate the variable cost variances for January