It is the policy of these forums that no pricing amounts be discussed here.
All we can suggest to you is to do your best job to estimate the amount of time you will need to spend on this, determine how much that time is worth to you, add any other overhead costs that may apply, and come up with a resulting amount. Then compare that amount with what your best guess is as to what the customer is able and willing to pay you. Then negotiate with the customer as needed to reach a mutually agreeable set of deliverables and price (or agree that no such agreement can be reached and move on to the next project).
