Here's the most important question:
Why do you think the store is at fault for this?
The answer is that the store is not at fault just because it happened there.
If you can prove (not just say) that the employees knew that the item was on the floor and ignored it, then you might have something.
But if it got there a few minutes before you did and nobody knew it was there, then there's no negligence and you don't collect anything.
It's possible that the store's insurance company might offer to pay your bills without any admission of fault and you'll have to sign a release to get that much.
Or the claim rep might offer you some go-away money in exchange for a release.
Or you might be told no liability, no money.
You'll just have to wait and see what happens.
Just keep in mind that you don't get anything if you don't ask.
They aren't going to look for you or fall over themselves trying to give you money.