Hi Pekka,
it's a little long winded, but you could try the following (assuming in this case your value is in a field called CHAR_10):
SELECT DEC(STRIP(TRANSLATE(SUBSTR(CHAR_10,1,2),' ','.'),B)
|| STRIP(TRANSLATE(SUBSTR(CHAR_10,3,2),' ','.'),B)
|| STRIP(TRANSLATE(SUBSTR(CHAR_10,5,2),' ','.'),B)
|| STRIP(TRANSLATE(SUBSTR(CHAR_10,7,2),' ','.'),B)
|| STRIP(TRANSLATE(SUBSTR(CHAR_10,9,2),' ','.'),B),10,2)
This takes the string a pair of characters at a time, converts '.' to a space, and then trims off any spaces at either end, concatenates them all together and finally converts to a decimal (10,2)
Hope this helps
Zeat