Amazon 5% and 7% discount on books not valid for business customers

Amazon is offering 5% discount on books for purchasing 3 books and 7% discount for 4 books according to the promotion mentioned in the books category
After spending a lot of time on November 30, books with this promotion were selected.
Yet when a business account was used with the NOVBVD discount code for businesses, the 7% discount did not appear at the checkout
So the online shopper had to remove the books from the shopping cart and purchase other items.