Gr. 8 Math - Balloon Prices

Here is the question I asked in class:
Lola bought a balloon at the carnival. She paid with 6 coins.
What might Lola have paid for her balloon?

(We determined that $0.06 was the cheapest balloon and $12.00 was the most expensive.)

I asked you to find ALL the possible amounts for homework but I've realized that's too much.
So, I would like you to find at least 50 possible amounts.
You must also find several amounts, between six cents and twelve dollars, that are not possible.