Trasher Ltd produces two grades of sand (X150 and X300) used in the manufacture of industrial abrasives. The results of operations last year were as follows: X150 X300 Total Manufacturing 4 000 tonnes 6 000 tonnes 10 000 tonnes Sales 3 000 tonnes 4 000 tonnes 7 000 tonnes Revenue $90 000 $150 000 $240 000 Variable manufacturing costs 20 000 15 000 $35 000 Variable selling costs 15 000 20 000 $35 000 Fixed manufacturing costs were $100 000 and fixed selling and administrative costs were $60 000. The company held no beginning inventories Required w (a) If Trasher uses a variable costing system, what was the operating income? (5 marks) (b) If Trasher uses absorption costing and allocates actual fixed manufacturing costs to inventory on the basis of actual tons produced, what was the operating income?( (c) Reconcile and explain the difference between your answers to parts (a) and (b)