A$(20).$FORMULATE PROBLEM AS A LINEAR PROGRAMMING PROBLEM.SET UP THE PROBLEM ONLY.THE PRICE OF THE PRODUCT IS $20$ USD.

PLANT $1$ PLANT $2$ PLANT $3$

DEMAND$($TON$)$

$\backslash$table$[[$SITE A$,$SITE B SITE C CAPACITY$($TON$),,],[10,4,11,70],[12,5,8,50],[9,7,6,160],[100,100,70,]]$