"Hello," Ron calls from where he's wrapping up with a customer at the register, using his best friendly shopkeeper voice. He distributes change and tells the customer to come again before he finishes his greeting. "Welcome to Weasleys' Wizard Wheezes. Let me know if you have any questions, queries, quandaries, or require any explanations."
Welcome, welcome! Sorry that my own reply's a bit late.
Alliteration is fun, right?