Many thanks, it works now!
So also mathematical operators must be inside straight brackets... now it is clear.

Hi guys, I want to display total price in USD in customs message (default currency of property is EUR)- So I used these variables: [CONVERT:EUR-USD] - works if used as is, shows conversion rate between two currencies [PRICENUM:] - works if used as is, value is displayed with a decimal point and no t...