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Popcorn Ltd uses a batch production method to produce its single product by combining two materials Corn and Salt. The company has budgeted for a material mix ratio of 90:10 for Corn and Salk respectively. The following information relates to each batch: Direct material input 200kg Material Corn standard price 1.50 per kg Salt standard price 3.00 per kg Actual results for month 10 were as follows: Output 1,890kg of popcorn Corn 1,140kg at a total price of 1,610 Salt 860kg at a total price of 2,780 (a) Calculate, for month 10 , the following variances: (i) material price for each material (ii) material usage for each material (iii) total material variance