How much does it cost to ship my cat from US(LA) to taiwan?

Depends upon the airline. Here's a start.

JUST SELL THEM TO THE THIA PLACE DOWN THE STREET.

Not sure. The whole process of transporting your cats into a different country can be very complicated, it's best to contact the airlines/airport & try to get all the information you can about it. Like someone else said, you're going to need to do a few things before you can transport your cats. Some countries quarantine pets for up to 6 months.

Call the airlines; they can tell you. You will need a health certificate from your veterinarian. Some countries make you start this process long in advance. Call the Counsulate of the destination country, and they can tell you what the requirements for getting into the country are. You also need an airline-approved carrier. Most airlines wont let you put a cat under the seat, so ask. Put a towel under the cat in the carrier in case it urinates. Pack a dry towel in your carry-on so you can change it if your cat soils the towel. Dont put cat litter in there. Good luck.

It you are flying put them into cages and put them under your seat