Import duties are around $50 per S9 (direct from Bitmain of course.)

CA sales tax is something like 8%, which they ask you to self report on your taxes.

Bitmain only accepts BCH, so whatever fees you get charged to buy that from your exchange.

Power supplies will run you another $200 or so. Shipping is something like $100, but it changes all the time.

So in total you're at:

$2320 for the machine, $200 for the PSU, $100 for shipping, $50 for import duty (or around $2370.)

Keep in mind you shouldn't run these on 110v power. They really need 220v for max efficiency. Also keep in mine PG&E rates are typically are .35 per KWh at residential rates, so each S9 is about $12.60 in power costs per day.