It looks like the calculator is simply wrong. It uses a 3% tax rate instead of the 6% tax rate they cite for the Elizabeth Warren’s Tax Plan.
This 2014 article changed the way we enjoy our Thanksgiving turkeys. Turkeys have always been an interesting study for economics. Because of the consistency of their demand in America, the price of a Thanksgiving turkey can be used as an indicator of inflation. This article should give you something fun to discuss this year.