Is it supposed to be formatted per the format specification within the excel file? The documentation does not indicate whether or not that is the case. In most cases, it appears that it obeys the format specification, but not always.
In my situation, within the excel file, there is a formula cell with a negative numeric result. In excel, it displays correctly as ($1234). From Aspose, we get $-1234.
I can post a spreadsheet if necessary