What is your integrity worth?

What is your integrity worth? I was at a restaurant the other day and I had an interesting experience. I was getting a burrito with guacamole and came up to the cashier and they rang my order up for a burrito with no guacamole. The lady asked me for my money and I told her that she needed to charge me for guacamole. She looked at me like I had a third eye. It was interesting that she was so shocked that I wanted her to charge me more for my meal. She asked me why I did that and I told her that my integrity was worth more than 89 cents. She laughed about it, but it was a great opportunity for me to be a witness by not taking advantage of the situation. What is your integrity worth? I really think its important for people that call themselves Christian to think about every action that they take during a day and really take inventory about what their integrity is worth. It is worth it to me to pay an extra 89 cents to be able to witness for Christ.