Beebee plc has the following standard for its only product: Selling price Direct labour Direct materials Variable overheads Fixed overheads 180/unit 2 hours at 10.50/hour 12 kg at 7/kg 2 hours at 2/hour 27 based on a budgeted output of 8,000 units/month During December 2021, there was an actual output of 8,500 units and the operating statement for the month was as follows: Sales revenue 1,445,000 Direct labour (16,500 hours) 181,500 Direct materials (100,000 kg) 675,000 Variable overheads (16,500 hours) 41,250 Fixed overheads 245,000 Operating profit 302,250 The variable overheads are absorbed on the basis of the direct labour hours. Required (a) Reconcile the budgeted profit with the actual profit with reference to the following variances for December 2021: (i) Sales price variance (ii) Sales volume contribution variance (iii) Materials price variance (iv) Materials efficiency variance (v) Labour rate (price) variance (vi) Labour efficiency (usage) variance (vii) Variable overhead (rate) variance (viii) Variable overhead (efficiency) variance (ix) Fixed overhead expenditure variance Show the calculations in each case. (14 marks) (b) Explain and discuss the variances you calculated in (a) (i) to (vi) above, comment on the possible cause, in each case, and discuss the possible interdependencies among them. (6 marks)