Who said, a customer is the most important visitor?

Question

a customer is the most important visitor to our premises. He/She is NOT dependent on US, WE are dependent on him/her. He/She is NOT an interruption of our work, HE/SHE IS the purpose of our WORK. He/She is not an outsider in our business, he/she is part of it. WE are not doing a favor by serving him/her. He/She is doing us a favor for giving us the opportunity to do so?

Answer 1

Sam Walton?