Under the full billing and history page there is an archive selected button at the bottom of the page. This button will archived all the line items that you have a check mark selected in the box out the left of the specific line item. This button will archive that line item and take it off the full billing and history section, the billing history section, the invoice, and the account statement. It is essentially throwing that line item in the trash. Please note that archiving the line item does not effect the account balance it is just hiding that line item so as to keep the billing history clean of mistakes.