Answer:
3 kg for $16.20
Explanation:
If you divide each ($11.70 divided by 2 and $16.20 divided by 3) it will tell you how much each bag costs.
For $11.70, each bag is sold at $5.85
For $16.20, each bag is sold at $5.40
Essentailly, each bag costs less for $16.20