Practical economics to save America's cultural capital
Kind of ironic that the larger contract is shown with a diet coke.
I think it's to keep it in scale. In the second one, for instance, the pen is present only to show how small the contract is.. it's pocket size!
BUT, diet implies that the soda has less calories. Therefore, a more appropriate drink would be a Big Gulp from Quickstop full of Dr. Pepper(maybe some cherry or vanilla flavoring added.)
You are correct. Your intelligence never ceases to amaze me!