The common import format allows you to import sales and optin data for any tracking id in the database.

The file has to be comma seperated, csv. The following is the format you need to follow:

tid, date (dd-mm-yyyy), # of sales, # of optins. The first line is assumed to be the column titles and won't be read.

Here's a sample file:

tid, date, sales, optins

1, 22-5-2007, 1, 0
22, 23-5-2007, 0, 1

and so on...