I'm a USA customer, can I pay in USD?

Yes you can
Provided the lead-time of the goods is maximum 12 weeks and your company is based in the USA.
Pricing quoted in USD, you can pay to our USD bank account in New York.

In case you pay with credit card, total will be converted to EURO on day of purchase using:
https://finance.yahoo.com/currency-converter/?guccounter=1
we can only charge credit cards in euros