At a certain jelly bean store, there are only two items to purchase:
Bags that cost $\$1.00$ and contain $50$ jelly beans.
Bags that cost $\$1.50$ contain $80$ jelly beans.
Kirk and Sally come to the store one day with $\$2$ each and plan to share the jelly beans they purchase.
If they pool their money, how many more jelly beans can they buy than if they purchase jelly beans independently?