"存货报告单" can be translated into English as "Inventory Report" or "Stock Report".
"Inventory Report" is a more formal and commonly used term in business and accounting contexts, referring to a detailed document that lists the quantities, values, and other relevant information about a company's inventory.
"Stock Report" is also a valid translation, especially in contexts where the focus is more on the physical quantity or availability of items in stock.
Both terms are acceptable, and the choice between them may depend on the specific context or industry preference.