Assuming 2L, board that size will cost you at least 3-4 USD in the thousands quantity.
Even if you make it in china, (suprise!) shipping and customs are expensive. Local PCB houses will provide you competitive prices for large batch anyway.
You can get a bit lower than that; see my post above (2nd from the top). About $2.00 incl. import duties, plus shipping, which should not exceed $0.50 per board. And that's for quantity 100, which the OP had planned for -- you should be able to get a better price for 1000.
I've entered the 120*130mm board in your calculator, and it gave me 227 EUR including shipping, excluding VAT+TAX. Last time (and I really hope it was last time forever) I ordered PCB from china, 21% tax was added to it, plus charge for customs (no import duty). So that will be a total of 288 USD, or in other words, exactly the amount that I wrote.
And I would still do it in Europe. Because the projects I do, the PCB is 3-5% of the total BOM cost. So I would rather pay even 50% extra to get it right. Because even one bad board will be PITA to track down the issue, expensive that it is scrapped, and simply the PCB quality they make here is better. Customer service is better. If I have an issue with my order, I pick up the telephone, they will apologize and run the production again.
It is never the pure upfront price tag, that you should be looking for. If you do, you are in the wrong industry.
I understand, that it is very competetive to get prototype boards from china. But it is a big no-no for production.