Hey there, ALeivestad.
Thanks for dropping by the Community. After playing around in a test account I found a way to send invoices to your customers with only the totals. If you go to customize the invoice template, you;ll notice an option that lets you un-check different items. There, you can see the items you're referring to on the screen and remove it from the printed section.
If you have any other questions, feel free to post here anytime. Thanks and have a nice afternoon.