I have an appliance repair business. I charge for labor and parts. I mark up my parts a flat percentage. How do I respond when a customer wants me to breakdown the cost of labor vs parts? Because I know what they are really trying to do is see if they can find the part cheaper on the internet.
You can either do it or say “Sorry, we don’t provide itemized invoices.”
Itemized invoices is a way for people to nickle and dime you. They see you’re charging $200 for a part that’s on Amazon for $75 and then try to negotiate a lower price or tell you they’ll order the part and have it waiting for you.
Big picture it’s all about how you want to run your business.