I just keep re-entering the BLACKFRIDAY code and then canceling it until my discount is 45% of my subtotal. So if your total is $20 before shipping then keep entering the code then canceling it until it comes up as discount $9.90.. just multiply subtotal x .45 = discount amt your aiming for. No special wheel page needed.. Goodluck!
Many Blessings from The Smoke Free Henning Home to Yours