$($Q$13-$Q$14)$ Consider the following transportation table to answer Q$13-$Q$14$:

Q$13.$ How much is the total cost of an initial solution based on the northwest$-$corner

rule?

Group of answer choices

$$220$

$$240$

$$260$

$$280$

Question $14????????$

Based on the result in Q$13,$ which of the following cells have the best $($i$.$e$.$ lowest$)$

improvement index using the modified distribution $($MODI$)$ method?

Group of answer choices $?????????????$

XB

$xC$

ZA

ZB