I have a problem that I have been unable to solve with using and looking over many, many e-commerce apps.

The situation is that for rental sites I need an option for the customer to use a quantity field AND a time field per product.

For instance if customer A wants to rent 3 rooms ( same priced room) for 6 days.

This would involve more calculations on the back end since your essentially have 2 product price fields.

Is this even possible with digistore or how hard would it be to implement.
Theres a huge demand for rental e-commerce enabled stores, and there is very little out there.

thanks