Customer 20 (stupid)

So a customer comes in and request us to show him how to use the payment machine..... now to give you an idea this machine is idiot proof. You get a series of pick option 1 or option 2 questions. Sometimes they throw in an option 3! And type your phone number and the first 4 letters of your last name and your done. So I read step by step what the screen says because hes obviously to dumb to read and follow instructions. We get to the end and he said thank you I wouldnt have made it that far alone.... so hes basically telling me he lacks the ability to answer the questions who provides your phone service, whats your phone number, whats the first 4 letters in your last name, is this the amount you want to pay, and do you want your receipt email or printed.... really?....