Answer: 2280 more
Explanation:
We need to first find out how much Dani spends to make one treat bag:
1520/2 = 760
Now we can find out how much it would cost to make 5 more bags:
760 x 5 = 3800
Therefore, Dani would have to spend 3800 - 1520 = 2280 more to make 5 more similar bags.