What is it with the transposing of 'I' and 'E' that gets so many people? Did they skip the day in elementary school when we were taught "I before E except after C or when sounded like A as in neighbor or weigh." Maybe it's all the other exceptions that throw them off. Whatever it is, we can still expect a retail store would know how to spell receipt.
Excuse me now... I need to go pick up the peices of my sanity that remain.