I've had many conversations with people in both the Marketing and Manufacturing departments about the wacky way invoices are created (not just cars, any products). They all have a million excuses why the line items are always such a mystery, and why some items are $0, while others are outrageously priced. The usual excuses are that it is related to how the boxes are packed (eg the accessory kit comes pre-boxed from a subcontractor, so it is a separate SKU kit that is just dropped into the master carton), country & regional differences in the configurations (eg The primary product is a single SKU, but a different AC power cord is needed for different countries, so that is a different SKU), special pricing configurations based on promotions, sales spiffs, co-advertising deals, etc, etc.
None of it makes any sense to me. Ultimately, when pressed, they usually just blame it on the IT guys for not being able to configure the ERP system to read their fraking minds... :rolleyes: