Assignment 2 - Less Is More (Final)

Again, this is another revision after the feedback. Adding a dollar sign to show the payment is a good idea. I guess I forgot about it when I was focusing on the printer diagram. Here's the changed process of abstraction.


While this is the final sign. I felt the 2nd last abstraction is still the best as a sign.


And this is how it'll look outside the library! (Or any printing services actually)