When your Suomen AsuntoHypoPankki statement arrives as a scan or a photo of the page rather than a clean export, the numbers on it are just pixels until they are extracted. When a statement arrives as a scan or a photograph, the result is an image, not a data file. The converter reads that image with OCR, identifying the transaction table and pulling out every row: date, description, amount, and the running balance after each entry. Because the source is a picture, small misreads can happen, such as a 3 turning into an 8, or a decimal point moving one place. That is why every digit is checked, not just extracted.
Whatever the running balance looks like on your Suomen AsuntoHypoPankki statement, Convert·Into checks it against the statement's own printed closing figure before you export anything. The checker compares the running balance the converter computed, line by line, against the closing balance printed on the statement itself. If the two figures match, the extraction is confirmed. If a single row does not add up, that row is flagged for review; the rest of the export stays intact, so a single questionable line never blocks the whole file.