How to change the shipping cost?

Hi,
I am looking for someone who can help me to change the shipping cost in this code:

<?php do_action('wpsc_before_shipping_of_shopping_cart'); ?>

   <div id="wpsc_shopping_cart_container">
   <?php if(wpsc_uses_shipping()) : ?>
      <table class="productcart" cellspacing="7" width="100%" style="margin:10px 0;">
         <?php /*?><tr class="wpsc_shipping_info">
            <td colspan="5">
               <?php _e('Please choose a country below to calculate your shipping costs', 'wpsc'); ?>
            </td>
         </tr><?php */?>

         <?php if (!wpsc_have_shipping_quote()) : // No valid shipping quotes ?>
            <?php if (wpsc_have_valid_shipping_zipcode()) : ?>
                  <tr class='wpsc_update_location'>
                     <td colspan='5' class='shipping_error' >
                        <?php _e('Please provide a Zipcode and click Calculate in order to continue.', 'wpsc'); ?>
                     </td>
                  </tr>
            <?php else: ?>
               <tr class='wpsc_update_location_error'>
                  <td colspan='5' class='shipping_error' >
                     <?php _e('Sorry, online ordering is unavailable to this destination and/or weight. Please double check your destination details.', 'wpsc'); ?>
                  </td>
               </tr>
            <?php endif; ?>
         <?php endif; ?>
         <?php /*?><tr class='wpsc_change_country'>
            <td colspan='5'>
               <form name='change_country' id='change_country' action='' method='post'>
                  <?php echo wpsc_shipping_country_list();?>
                  <input type='hidden' name='wpsc_update_location' value='true' />
                  <input type='submit' name='wpsc_submit_zipcode' value='Calculate' />
               </form>
            </td>
         </tr><?php */?>

         <?php if (wpsc_have_morethanone_shipping_quote()) :?>
            <?php while (wpsc_have_shipping_methods()) : wpsc_the_shipping_method(); ?>
                  <?php    if (!wpsc_have_shipping_quotes()) { continue; } // Don't display shipping method if it doesn't have at least one quote ?>
                  <tr class='wpsc_shipping_header'><td class='shipping_header' colspan='5'><?php echo wpsc_shipping_method_name().__(' - Choose a Shipping Rate', 'wpsc'); ?> </td></tr>
                  <?php while (wpsc_have_shipping_quotes()) : wpsc_the_shipping_quote();  ?>
                     <tr class='<?php echo wpsc_shipping_quote_html_id(); ?>'>
                        <td class='wpsc_shipping_quote_name wpsc_shipping_quote_name_<?php echo wpsc_shipping_quote_html_id(); ?>' colspan='3'>
                           <label for='<?php echo wpsc_shipping_quote_html_id(); ?>'><?php echo wpsc_shipping_quote_name(); ?></label>
                        </td>
                        <td class='wpsc_shipping_quote_price wpsc_shipping_quote_price_<?php echo wpsc_shipping_quote_html_id(); ?>' style='text-align:center;'>
                           <label for='<?php echo wpsc_shipping_quote_html_id(); ?>'><?php echo wpsc_shipping_quote_value(); ?></label>
                        </td>
                        <td class='wpsc_shipping_quote_radio wpsc_shipping_quote_radio_<?php echo wpsc_shipping_quote_html_id(); ?>' style='text-align:center;'>
                           <?php if(wpsc_have_morethanone_shipping_methods_and_quotes()): ?>
                              <input type='radio' id='<?php echo wpsc_shipping_quote_html_id(); ?>' <?php echo wpsc_shipping_quote_selected_state(); ?>  onclick='switchmethod("<?php echo wpsc_shipping_quote_name(); ?>", "<?php echo wpsc_shipping_method_internal_name(); ?>")' value='<?php echo wpsc_shipping_quote_value(true); ?>' name='shipping_method' />
                           <?php else: ?>
                              <input <?php echo wpsc_shipping_quote_selected_state(); ?> disabled='disabled' type='radio' id='<?php echo wpsc_shipping_quote_html_id(); ?>'  value='<?php echo wpsc_shipping_quote_value(true); ?>' name='shipping_method' />
                                 <?php wpsc_update_shipping_single_method(); ?>
                           <?php endif; ?>
                        </td>
                     </tr>
                  <?php endwhile; ?>
            <?php endwhile; ?>
         <?php endif; ?>

         <?php wpsc_update_shipping_multiple_methods(); ?>

         <?php if (!wpsc_have_shipping_quote()) : // No valid shipping quotes ?>
               </table>
               </div>
			</div>
            <?php return; ?>
         <?php endif; ?>
      </table>
   <?php endif;  ?>

   <?php
      $wpec_taxes_controller = new wpec_taxes_controller();
      if($wpec_taxes_controller->wpec_taxes_isenabled()):
   ?>
      <table class="productcart" cellspacing="7" width="100%">
         <tr class="total_price total_tax">
            <td colspan="3">
               <?php //echo wpsc_display_tax_label(true); ?>
            </td>
            <td colspan="2">
               <span id="checkout_tax" class="pricedisplay checkout-tax"><?php //echo wpsc_cart_tax(); ?></span>
            </td>
         </tr>
      </table>
   <?php endif; ?>
   <?php do_action('wpsc_before_form_of_shopping_cart'); ?>

The actual shipping cost is 6 euros for The Nederland and 12 euros for all the other country. Where can I change the code to insert the new values??? For example, if I wanted to put 10 euro for the Netherlands, and 14 for other nations, what should I change?

This is the plugin I have: WP eCommerce  3.8.8.2
And this is the code:

<?php
/**
  * Plugin Name: WP e-Commerce
  * Plugin URI: https://getshopped.org/
  * Description: A plugin that provides a WordPress Shopping Cart. See also: <a href="https://getshopped.org">GetShopped.org</a> | <a href="https://getshopped.org/forums/">Support Forum</a> | <a href="https://docs.getshopped.org/">Documentation</a>
  * Version: 3.8.8.2
  * Author: Instinct Entertainment
  * Author URI: https://getshopped.org/
  **/

/**
 * WP_eCommerce
 *
 * Main WPEC Plugin Class
 *
 * @package wp-e-commerce
 */
class WP_eCommerce {

	/**
	 * Start WPEC on plugins loaded
	 */
	function WP_eCommerce() {
		add_action( 'plugins_loaded', array( $this, 'init' ), 8 );
	}

	/**
	 * Takes care of loading up WPEC
	 */
	function init() {
		// Previous to initializing
		do_action( 'wpsc_pre_init' );

		// Initialize
		$this->start();
		$this->constants();
		$this->includes();
		$this->load();

		// Finished initializing
		do_action( 'wpsc_init' );
	}

	/**
	 * Initialize the basic WPEC constants
	 */
	function start() {
		// Set the core file path
		define( 'WPSC_FILE_PATH', dirname( __FILE__ ) );

		// Define the path to the plugin folder
		define( 'WPSC_DIR_NAME',  basename( WPSC_FILE_PATH ) );

		// Define the URL to the plugin folder
		define( 'WPSC_FOLDER',    dirname( plugin_basename( __FILE__ ) ) );
		define( 'WPSC_URL',       plugins_url( '', __FILE__ ) );

		//load text domain
		if( !load_plugin_textdomain( 'wpsc', false, '../languages/' ) )
			load_plugin_textdomain( 'wpsc', false, dirname( plugin_basename( __FILE__ ) ) . '/wpsc-languages/' );

		// Finished starting
		do_action( 'wpsc_started' );
	}

	/**
	 * Setup the WPEC core constants
	 */
	function constants() {
		// Define globals and constants used by wp-e-commerce
		require_once( WPSC_FILE_PATH . '/wpsc-core/wpsc-constants.php' );

		// Load the WPEC core constants
		wpsc_core_constants();

		// Is WordPress Multisite
		wpsc_core_is_multisite();

		// Start the wpsc session
		wpsc_core_load_session();

		// Which version of WPEC
		wpsc_core_constants_version_processing();

		// WPEC Table names and related constants
		wpsc_core_constants_table_names();

		// Uploads directory info
		wpsc_core_constants_uploads();

		// Any additional constants can hook in here
		do_action( 'wpsc_constants' );
	}

	/**
	 * Include the rest of WPEC's files
	 */
	function includes() {
		require_once( WPSC_FILE_PATH . '/wpsc-core/wpsc-functions.php' );
		require_once( WPSC_FILE_PATH . '/wpsc-core/wpsc-installer.php' );
		require_once( WPSC_FILE_PATH . '/wpsc-core/wpsc-includes.php' );

		// Any additional file includes can hook in here
		do_action( 'wpsc_includes' );
	}

	/**
	 * Setup the WPEC core
	 */
	function load() {
		// Before setup
		do_action( 'wpsc_pre_load' );

		// Legacy action
		do_action( 'wpsc_before_init' );

		// Setup the core WPEC globals
		wpsc_core_setup_globals();

		// Setup the core WPEC cart
		wpsc_core_setup_cart();

		// Load the thumbnail sizes
		wpsc_core_load_thumbnail_sizes();

		// Load the purchase log statuses
		wpsc_core_load_purchase_log_statuses();

		// Load unique names and checout form types
		wpsc_core_load_checkout_data();

		// Load the gateways
		wpsc_core_load_gateways();

		// Load the shipping modules
		wpsc_core_load_shipping_modules();

		// Set page title array for important WPSC pages
		wpsc_core_load_page_titles();

		// WPEC is fully loaded
		do_action( 'wpsc_loaded' );
	}

	/**
	 * WPEC Activation Hook
	 */
	function install() {
		global $wp_version;
		if((float)$wp_version < 3.0){
			 deactivate_plugins(plugin_basename(__FILE__)); // Deactivate ourselves
			 wp_die( __('Looks like you\'re running an older version of WordPress, you need to be running at least WordPress 3.0 to use WP e-Commerce 3.8', 'wpsc'), __('WP e-Commerce 3.8 not compatible', 'wpsc'), array('back_link' => true));
			return;
		}
		define( 'WPSC_FILE_PATH', dirname( __FILE__ ) );
		require_once( WPSC_FILE_PATH . '/wpsc-core/wpsc-installer.php' );
		$this->constants();
		wpsc_install();

	}

	public function deactivate() {
		foreach ( wp_get_schedules() as $cron => $schedule ) {
			wp_clear_scheduled_hook( "wpsc_{$cron}_cron_task" );
		}
	}
}

// Start WPEC
$wpec = new WP_eCommerce();

// Activation
register_activation_hook( __FILE__, array( $wpec, 'install' ) );
register_deactivation_hook( __FILE__, array( $wpec, 'deactivate' ) );
?>

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Can someone help me?

Thank you very much!!

https://www.ads-software.com/plugins/wp-e-commerce/