1. Three fertilizers factories X, Y and Z located at different places of the country produce 6,4 and 5 lakh tones of urea respectively. Under the directive of the central government, they are to be distributed to 3 States A, B and C as 5, 3 and 7 lakh respectively. The transportation cost per tones in rupees is given below:

ABC X 11 17 16 Y 15 12 14 Z 20 12 15

Find out suitable transportation pattern at minimum cost by North West Corner method and Least Cost method.