The invoice you send vs. the invoices you receive
Your shop system handles the first one beautifully. The second one is on you.
Every shop system makes a clean customer invoice — that problem is solved. The unsolved one arrives by the door: the parts invoice on the seat of the delivery driver's truck, the packing slip stapled to the box from the yard, the emailed PDF from the vendor who doesn't integrate with anything.
Even if you order through PartsTech or RepairLink, those integrations put the order in — ordering a part and receiving a part are different jobs. The paper that shows up with the parts still has to be keyed: each part onto the right repair order, marked arrived, inventory counted, costs entered. And everything ordered over the phone or from the yards never touched an integration at all.
The cost isn't just the hours. One fat-fingered part cost quietly wrecks the numbers on a job you thought you'd priced right — and you find out at the end of the quarter, not the end of the day.