Answer:
$1.30 or 130 cents
Step-by-step explanation:
You divide 91 by 14 to get the amount per ounce and you would get 6.5. Then you multiply that by 20 to get the new amount which is 130, or $1.30.
There is not enough information so this equation is an unsolvable.
You could figure out the equation if the 3 were M and M had a number but this is unsolvable. SORRY