FORMAT CELL - Number, steps:

1. Select the cell(s).
2. FORMAT menu.
3. CELL... item.
4. FORMAT CELL... dialog box appears.
5. NUMBERING tab.
6. CATEGORY list: (GENERAL, NUMBER, CURENCY, ACCOUNING).
7. DECIMAL PLACES list number of decimalnih places (number).
8. USE 1000 SEPARATOR separator for thousand.
9. NEGATIVE NUMBERS how to show.
10. The end (Kraj).

Worning:
  at CURENCY & ACCOUNING is used SIMBOL for value ($, €,...).