WooCommerce Dropship store plugin

We have developed a simple wordpress/woocommerce based store for retailing products from a wholesaler who provides a dropship service. The wholesaler provides xml & csv feeds for the products, stock levels etc which we plan to import using WP All Import. The problem that we need solving is that the wholesaler's xml feed only contains the cost price of the item, we need a solution that allows us to add a global profit margin that automatically calculates the retail price for each item and displays this data in the woocommerce price field.