I restarted the pc, settled a new ticket and I’m still getting the Not a Number error:
I think we can make this work but what I need is as simple, robust and reliable solution as possible. Making a single mistake in the xml message could bring me into serious troubles with financial authorities.
Taking a number (tax amount) from database, format it as a string, then use a script to replace some characters, format it back to a number to use it to calculate a tax base, somehow deal with a possible rounding error and all of this just to get a number that Samba can return with the {TAXABLE AMOUNT:XXX} tag- this is just too complicated solution to my taste.