Traditional Culture Encyclopedia - Photography and portraiture - How to invoice photographic equipment? What is the classification of photographic equipment invoices?

How to invoice photographic equipment? What is the classification of photographic equipment invoices?

If the user invoices for quality assurance, let the seller start to invoice when buying the machine, which is the kind of formal invoice, which is officially recognized after sale.

If the unit buys photographic equipment, how does the money spent go through the accounting process, that is the financial affairs of the unit ... According to the relevant accounting system, ...