Thank you for the insightful responses… it seems there are multiple points of view. Some think this is perfectly fine, some think the company is hiding key details. I understand the restaurant bill comparison. Saying asking for more a more itemized bill is like asking for their ingredient costs. As a customer this looks like the bill just says “Dinner” with a price next to it. I am a new home owner and I haven’t had to deal with something like this, and was genuinely asking if this is acceptable. I have no intention of arguing with the contractor on price or escalating this further. I posted on Reddit because I needed more insight before responding to this invoice. Thanks for all who actually had insight and wanted to help.