Problem 7 80 kgs. of material A at a standard price of RO 2 per kg and 40 kgs of material B at a standard price of RO 5 per kg. were to be used to manufacture 100 kgs. of a product. During a month, 70 kgs. of material A priced at RO 2.10 per kg. and 50 kgs. of material B priced at RO4.50 per kg. were actually used and the output of the product was 102 kgs. Find out the material variances