a) List any three (3) causes of material variances and three 3 causes of labour variances (6marks) b) Supreme Trading manufactures one product. The standard cost for one unit for November was as follows: Direct material 5 kilos at $8 per kilo Direct labour 4 hours at $12 per hour Variable overheads (based upon an overhead absorption rate of $4 per labour 40 48 hour) 16 104 Budgeted output in November was 1 200 units. The actual results were as follows: i. 1 300 units were made ii. Direct material used was 6 600 kilos at a total cost of $50 160 iii. Direct labour was 5 330 hours at a cost of $65 026 iiii. Actual variable overheads were $26 650 Calculate the following 1) Total material cost variance 2) Material price variance 3) Material usage variance Total labour cost variance 5) Labour rate variance 6) Labour efficiency variance