Obviously as think link is an image of a tweet, I don't have the original article to reference.

But it says "average household delivery costs," so it's quite likely that it doesn't just include Amazon or other online ordering.

In order to make their point as persuasive as possible, they likely fudged the numbers and included all deliveries. Saying things like, "Well, UPS would save money by contracting the last mile, as well, so the fact that this stops them from doing that is a cost for New Yorkers."

Anything that makes the number larger and has any sort of stupid excuse would be enough. If the number is larger, they can scare people and make it more likely that they get their way.