Mr Prescott, I've made a big mistake. I used the wrong price for a camera. It became clear/obvious because the customer left his receipt on the counter. The customer bought a Fuji camera but I scanned/used the price tag of a Canon camera. The Fuji camera is 89 pounds more expensive. Should I send a new invoice with the right price or do you have a better idea?
Should I call the customer and say that I'm sorry? Can you please call me as soon as possible? I'm really sorry. Emily