The base price of a chick does not in ANY WAY compare to the end cost of a full grown and productive bird.
On top of the repairs I'd charge $25 for any girls who are still producing quality eggs. Minimum. That's what I sell a bird for once she hits the age where she can lay.
Whatever you do, keep in mind that the guy, I'd hope, feels horrible.
I'm sure he will work with you to get your repairs done as well as the price of love and replacement costs.