Modify FedEx Shipping Method Plugin to reference a custom field _supplier_zip
on each product that contains the origin post code.
Currently the plugin uses a field in the plugin options to set the vale for origin postcode on all products globally.
We need a function that will allow the plugin to use a custom field on each product with the id of '_supplier_zip' to set the origin post code for each product.
'id' => '_supplier_zip
https://woocommerce.com/products/fedex-shipping-module/
This is where the origin postal code is referenced in the plugin files
private function set_settings() {
$this->origin = apply_filters( 'woocommerce_fedex_origin_postal_code', str_replace( ' ', '', strtoupper( $this->get_option( 'origin' ) ) ) );
}