For this feature:
24 hours Free Shipping
If this option is enabled, the customer will get Free Shipping if they ordered in the last 24 hours.
We would love the option to enter how many hours they have for free shipping on the next order.. I would choose 6 hrs because for example, a customer pays for one item today at 7pm. They pay 4.00 shipping ( for one item) We ship at 9am tomorrow. That item goes out. THEN they order again at 11am tomorrow, and we cover the 7.00 shipping to ship that out when they still get free shipping on it because it is still within 24 hrs of that last order.