In Reply to: we do ours in excel spreadsheet posted by iguana bw on Tuesday, 13. October 2009 at 18:18 Bali Time:
I have one field in the top line that I change to rate on the Dirgahayu web site, because that's where we change money anyway. The whole page self calculates with the one change and I just print it out on card. I have also used the same page, with appropriate currency changes, for people travelling to Malaysia and Vietnam.