For the given transportation problem:

To

From

A

B

C

Supply

X

$$$$10$

$$$$19$

$$$$12$

$100$

Y

$$$$17$

$$$$13$

$$$$9$

$150$

Z

$$$$20$

$$$$18$

$$$$14$

$505$

Demand

$80$

$120$

$70$

a$)$ Based on the given demand and$$supply$,$ the given transportation problem is $[$ Select $]["",$ "unbalanced", "balanced", $""]$

b$)$ Before finding the initial$$solution$,$ a $[$ Select $]["$dummy supply node", "dummy node", "dummy destination node", "both dummy dest. and supply node"$]$ should be introduced.

c$)$ The total cost of the initial solution developed using the intuitive$$ lowest$-$cost method$$ will be $[$ Select $]["3100","3150","3820","3190"]$

d$)$ The total cost of the optimal solution$=[$ Select $]["3190","3000","3045","3150"]$