May I know how to use the QUANTITYIN function.
QUANTITY()
You can use this formula to calculate the total order quantity for the products in the form
QUANTITYIN("category_name")
You can use this formula to calculate the order quantity for the products in the category_name page. For example, if you have a create a page with Vegetables as the page title, you can use the QUANTITYIN("Vegetables") to calculate the order quantity for the products in the Vegetables page.