Hard coding data during import
you'll have to add a column -> with Financial Type to your Exported Data before you can import it into CiviCRM; First you make the Financial Type in your CiviCRM -> if you're not sure what these monies make a Financial Type: Legacy Monies; Then create a Financial Type column in your Exported Data -> and fill it with: Legacy Monies. That should work - and will not take too long!