# Pre-orders and Backorders HotWax Commerce can read Purchase Orders from the ERP to identify which products are available for pre-sell, the quantity available, and their expected delivery dates. Merchants can also manually upload POs using the HotWax Commerce PO Import App. HotWax Commerce automates the listing and delisting of pre-order and backorder items on Shopify by analyzing purchase orders. This includes displaying estimated delivery dates on the PDP, efficiently processing pre-orders/backorders, and ensuring accurate fulfillment. HotWax Commerce also provides a Pre-order PDP App that replaces the default 'Add to Cart' button and displays estimated delivery dates on the Shopify PDP. --- # Agent Instructions: Querying This Documentation If you need additional information that is not directly available in this page, you can query the documentation dynamically by asking a question. Perform an HTTP GET request on the current page URL with the `ask` query parameter: ``` GET https://docs.hotwax.co/documents/learn-shopify/shopify-integration/preorders-and-backorders.md?ask= ``` The question should be specific, self-contained, and written in natural language. The response will contain a direct answer to the question and relevant excerpts and sources from the documentation. Use this mechanism when the answer is not explicitly present in the current page, you need clarification or additional context, or you want to retrieve related documentation sections.