Allowing sections on the Authorization page in addition to adding line items would allow for more flexibility in providing a good/better/best roofing quote on the quote details page, and including a more complex optional upgrade such as a gutter system. This would then allow users to include the parts that would be necessary to include on a material order. Showing section totals would also be helpful on a more complex optional upgrade.

In other words, create a section that could be selected as a whole with multiple line items instead of only being able to select a single line item.