Changing +/- 4000 fax numbers. the first 0 ( zero ) and "-" must be removed and +31 must come in place at the beginning of each number. It must be easy for someone with experience with scripts, but I it no idea how that works.
The "-" is not always in the same position.
Faxnummers are ordened in 16 Openoffice- excel files.
Example 071-5421137 must be converted to: +31715421137
and so on for the other 3999!