Hi there, Jfunk.
I just wanted to hop in and provide some insight about this matter.
Generally, non-inventory items are those that you purchase but do not resell, sell but do not purchase, or purchase and resell but do not track as inventory. If one of these descriptions match the core, then you may enter it as a non-inventory item.
There are also other item types that you could consider for the core charge. We offer an excellent comparison guide that will help you decide which one works better for your business.
With the information you've gained here, I'm sure you'll find the perfect option for the core charge. Keep in touch with me here and let me know what else I can do to help you succeed with QuickBooks. Thanks for reaching out, wishing you and your business the best!