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We have different suppliers which provide us with datafeeds each day. We download those datafeeds into SQL tables. Our systems are already in place which will set the price to $0 if the product does not appear in any of the datafeeds. We require a page that will allow us to choose any category (and top level category) which will display all products that have there price set to $0 for all suppliers. Next to each product will be a checkbox which is we tick will delete the product from the database. We also require a single checkbox that once ticked will tick all boxes at once.
This work must be optomized. This page when opened will list all products immediately. We do not want a script that will run and check each product individually.