AbleCommerce Shopping Cart Software

Client wants to have autoship products in able commerce. So products assigned with autoship, when added into cart, it will be excluded from volume or all discounts. For this product, price would be list price of the product. So if client order any particular product with autoship, he will be charged into his credit card after each specified period and shipment. We are using Authorize.net payment gateway. so Auto-Rebilling should be occurred for this order at specified interval. Can we customize such functionality in able commerce? If yes, anyone can guide me how can i customize this?

Thanking you in advance!!!!!