There are several attributes that can be repeated within Assortment; these are indicated using numbers (e.g. "PRICE QUALIFIER 1" or "PRICE QUALIFIER 2".
This means you can add an unlimited number of like attributes to better describe your items.
To add a repeatable field, simply click on the row header of the existing attribute, select "Copy", right-click on a new column after the current last attribute in the spreadsheet and select "Insert Copied Cells".
Then, updated the number (e.g. "3") with the next number in the sequence (e.g. "4").
Continue this process for each attribute you want to repeat.