add_filter( 'woocommerce_product_get_price', 'wcfm_update_product_price', 50, 2);
add_filter( 'woocommerce_product_get_regular_price', 'wcfm_update_product_price', 50, 2);
add_filter( 'woocommerce_product_get_sale_price', 'wcfm_update_product_price', 50, 2);

function wcfm_update_product_price( $price, $product ) {
    global $WCFMmp;

    $vendor_id = wcfm_get_vendor_id_by_post( $product->get_id() );
    if( $vendor_id && !wcfm_is_vendor() ) {
        $commisson_rule = $WCFMmp->wcfmmp_product->wcfmmp_get_product_commission_rule( $product->get_id() );
        $total_commission = 0;
        $price = (float)$price;
        if( !empty( $commisson_rule ) && is_array( $commisson_rule ) && isset( $commisson_rule['percent'] ) ) {
            $price += ( $price * ((float)$commisson_rule['percent']/100) );
        }
        if( !empty( $commisson_rule ) && is_array( $commisson_rule ) && isset( $commisson_rule['fixed'] ) ) {
            $price += (float)$commisson_rule['fixed'];
        }

        $price += $total_commission;
    }

    return $price;
}

add_filter( 'wcfmmp_order_item_commission', function( $item_commission, $vendor_id, $product_id, $variation_id, $item_price, $quantity, $commission_rule, $order_id ) {
    $seller_listing_price = ($item_price - (float) $commission_rule['fixed']) / (1 + ((float) $commission_rule['percent']/100));
    $item_commission = $seller_listing_price;
    return $item_commission;
}, 50, 8 );