If you want to sum a manually selected (highlighted) cellrange:
1. Click on target cell
2. click on SUM icon on the toolbar,
3. highlight the desired cellrangerange with mouse,
4. hit Enter.
Tibor Kovacs, Hungary; AOO4.1.2; LO4.4.7 and Portable LO5.0.4 version on Win7x64Prof
Please, edit the topic's initial post, and add the word "[Solved]" at the beginning of the subject line - if your problem has been solved.