Consider the data below

	Dest. 1	Dest. 2	Dest. 3	Dest. 4	Supply
Origin 1	12	18	9	11	100
Origin 2	19	7	30	15	55
Origin 3	8	10	14	16	150
Demand	60	100	85	60

(a) Calculate a solution using the northwest-corner rule. Calculate the cost of this solution. (5 points)

(b) Calculate the solution using intuitive lowest cost method. Calculate the cost of this solution. (5 points)

(c) Using the solution in (b), calculate improvement indices, iterate once. Can you achieve a better solution? (5 points)