Can I create an order summary?

I have a client looking for a summary of her charges for a specific month - is there an easy way to grab that info and send it to her?

sounds like you may want to just dig through some of the basic Ecommerce>Reporting (Payments report may be a good place to start, for something like this)

The Customer Lifetime Value report (Under Ecommerce>>Reports) might help too - it can give you a summary of all orders and transactions on a contact by contact basis.