I may be completely wrong here, but I think the only way to do this would be transforming your values from integers to string, with both thousands separators and decimals (if any) and add th ecurrency values.
This though would not be ideal for an excel file as you won't be able to do any other operation you would normally do, e.g. sums, tables, charts, etc.
However, one alternative is to download an excel file and you can set the columns up so that the formatting is currency values. This would ensure your cells are still integer values BUT with the actual format of currency.