Price Book in foreign currency

Price Book in foreign currency

We have many customers who buy in foreign currency (USD), where our base currency is our local currency (AUD).  It would be normal (it is in Zoho Books, Zoho Inventory etc.) to assign a currency to a price book, but I cannot find this option in Zoho CRM Quotes.  Does anybody know how you do this?  If you can't it makes quoting from Zoho CRM pretty useless.  (you cannot quote any account other than ones in your base currency).  

What am I missing?