Best thing you can do (The cheating way) Is to Time travel back in time (If your store is closed) to order the stuff you need. Then TT to before 5 PM to get your orders.
Use this guide to help you know what you need to pass: http://www.thonky.com/animal-crossing-new-leaf/gracie-fashion-check/
Also, you can time travel to the day before she came, then back to the same day an she'll give you another test, with a different theme