ABC$123-45$ records are produced by Jackson Enterprises at three different locations, $1,2,$ and $3,$ and shipped to three sales centers named A$,$ B and C$.$ Company creative director Michael is unconcerned with efficiency, but operations manager Tito wishes to move the product as inexpensively as possible. The cost to transport one crate from each source to each destination is indicated in the table. as well as the demand at each sales center and the supply at each manufacturing facility.

A B C Total Supply

$1$ $$5$ $$6$ $$7320$

$2$ $$6$ $$9$ $$8420$

$3$ $$7$ $$4$ $$6520$

Total demand $400400460$

b$)$ What is the optimal answer to this problem?