Hey jshieldsheatings,
Welcome to the UK community page for QuickBooks Online.
This is a Question I'll have to direct to your accountant I'm afraid. I'm trained by Intuit to always advise my customers to make QB match what happened in real life, so if you have 100 invoices from supplier, you need to add 100 invoices against your suppliers. Your accountant will be able to tell you if it's suitable to only put a monthly total in.
I'll leave this post open to our wider community to share their experiences with this too.