This was for a magazine cover illustrating the cost of health care. My client supplied the image on the left and asked if I could change the bills to much higher demominations. This made me wonder if there was a "how-to" book available to show how this could be done... there's not. Still, I felt certain that I could figure it out if I had the proper images (I was fresh out of $5000s). In the end, I found photos of actual bills, and worked out the method. It took more time than I could actually invoice, but I walked away with a new technique and a lot more confidence in my abilities.