Known issue (and solution) in eCart 4 with European Currency
There was a bug discovered in eCart 4, where using the European currency format 10.000,00 will not display correctly in the shopping cart. The fix is provided via a file in the Download Center that you can copy/paste to any of your sites, as needed.
Log in and visit the Download Center. Click on eCart 4; then click on the Known Issues section. Download the related zip file and follow the instructions in the readme file.