Answer :
cost of material labour & overheads is in the ratio 0f 3:4:5
if cost of material = 33.60
cost of labour = 4/3* 33.60 = 44.8
cost of material = 5/3 * 33.60 = 56
cost of article = 33.60+ 44-8 + 56 = 134.4
if cost of material = 33.60
cost of labour = 4/3* 33.60 = 44.8
cost of material = 5/3 * 33.60 = 56
cost of article = 33.60+ 44-8 + 56 = 134.4