Pre-pandemic, at the end of 2019, you could find a 40' container from Yantian to base port on the West Coast for about $3500 USD
The rate for one right now is above $20k USD and rising.
Not sure how much one crate of T81s weighs, but you can load about 25 tons in the box, or 20 something pallets.
Divide the difference in ocean freight, per rifle and it gets pretty steep, pretty quickly.
This is a direct quote from the listing on TI's website:
"Comes with two 5/30 magazines. All parts and components are brand new production, not surplus. Non-restricted class, in-stock now."
If you ordered the gun, and had a drop-down of 3 spare magazines selected as well, yes, your math for 5 would check out.
TI is not above making mistakes. If you truly did select and pay for 3 spare magazines, and they didn't send any spares, it was certainly on accident and you can bet the rifle they will make it right if you reach out to them.
It might take time, as they are likely swamped with the orders. But they will make it right.
That's a few grand extra going CP/CN's way, then all the local pre-pull, delivery and chassis fees.
Oh and let's not forget that these rates are for general cargo, the moment the carriers find out the nature of goods and that there is export/import permits involved when the booking is made, all these go up a little more.
Just picked up my fixed stock with 3 extra mags (so 5 total) and a sling from post office today, the mags and sling came in a separate package but both arrived at the same time yesterday. The rifle is very nice, the phosphate is sweet and the wood is good with a little bit of roughness around some edges but that's to be expected. The top handguard is solid from side to side but has a small amount of up and down movement like my Ruskie SKS does. Overall I'm actually incredibly impressed with it compared to the other Chinese firearms I've handled, it's beautiful. Will probably pick up a folder in the next shipment too. Thanks so much TI!