Yes, the cart can handle your requirement. In the cart admin settings in the "General Cart Configuration" section there is a checkbox titled "Enable Inventory Management". Check this box if you would like the cart check for available inventory when a customer is checking out. When “Enable Inventory Management” is checked the cart will check for available quantity on hand, if quantity on hand for a product is less than the quantity the user has added to the cart, then the cart will display a message and not allow the user to proceed past the cart screen. If quantity on hand is available then the customer is allowed to proceed through the checkout and after a successful order, the quantity on hand field will be decremented by the quantity ordered. Product quantity on hand is managed in the product setup screen. When “Enable Inventory Management” is not checked the cart will not manage inventory as described above.