Shipping from China to a US coastal warehouse is probably modestly under $200, including packaging, assuming it's shipped in a 40" container. Possibly less if there's other cargo that can be used to fill the remaining space.

I suspect the domestic costs are really dependent on volume (like, can you ship a container of 45 TVs to a warehouse near NYC or do you have to ship each unit individually) and I don't feel confident estimating that side of it.