Price component with VAT

I needed a price formatter that will display the price like:

€ 45,00 including 19% VAT, excluding shipping

or in case of 6% VAT:

€ 5,00 including 6% VAT, excluding shipping.

Unfortunatly I couldn't figure it out how to do this with this module, so based on your module I created the following, maybe you can implement it and make it better.

function MYMODULE_field_formatter_info() {
  return array(
    'commerce_price_prefix_suffix_vat' => array(
      'label' => t('Price with Prefix / Suffix and VAT'),
      'field types' => array('commerce_price'),
      'settings' => array(
        'prefix' => '',
        'suffix' => '',
        'text_format' => NULL,
        'calculation' => TRUE,
		'show_vat' => TRUE,
      ),
    ),
  );
}

function MYMODULE_field_formatter_settings_form($field, $instance, $view_mode, $form, &$form_state) {
  $display = $instance['display'][$view_mode];
  $settings = $display['settings'];
  $element = array();

  switch ($display['type']) {
	  
	 case 'commerce_price_prefix_suffix_vat':
      $element['calculation'] = array(
        '#type' => 'checkbox',
        '#value' => TRUE,
        '#title' => t('Show calculated price'),
        '#default_value' => empty($settings['calculation']) ? 'TRUE' : $settings['calculation'],
      );

      $element['prefix'] = array(
        '#type' => 'textfield',
        '#title' => t('Prefix'),
        '#description' => t('Text will be shown before the price'),
        '#default_value' => empty($settings['prefix']) ? '' : $settings['prefix'],
      );

      $element['suffix'] = array(
        '#type' => 'textfield',
        '#title' => t('Suffix'),
        '#description' => t('Text will be shown after the price'),
        '#default_value' => empty($settings['suffix']) ? '' : $settings['suffix'],
      );
	  
      $element['show_vat'] = array(
        '#type' => 'checkbox',
        '#value' => TRUE,
        '#title' => t('Show including or excluding VAT rate'),
        '#description' => t('Text will be shown after the price'),
        '#default_value' => empty($settings['show_vat']) ? 'TRUE' : $settings['show_vat'],
      );


      // Check which text filters the current user is permitted to use.
      global $_MYMODULE_account;
      $filter_options = array();
      foreach (filter_formats($_MYMODULE_account) as $key => $values) {
        $filter_options[$key] = $values->name;
      }

      $element['text_format'] = array(
        '#type' => 'select',
        '#title' => t('Text Format'),
        '#options' => $filter_options,
        '#description' => t('The text format filter that will be applied. The same filter will be applied to prefix and suffix.'),
        '#default_value' => empty($settings['text_format']) ? '' : $settings['text_format'],
      );



    break;
  }
  

  return $element;
}


function MYMODULE_field_formatter_settings_summary($field, $instance, $view_mode) {
  $display = $instance['display'][$view_mode];
  $settings = $display['settings'];
  $summary = array();

  switch ($display['type']) {

    case 'commerce_price_prefix_suffix_vat':

      $text_format = empty($display['settings']['text_format']) ? NULL : $display['settings']['text_format'];

      if ($settings['calculation'] == TRUE) {
        $summary[] = t('Show calculated price with prefix <em>') . check_markup($settings['prefix'], $text_format) . t('</em> and suffix <em>') . check_markup($settings['suffix'], 'filtered_html') . '</em>';
      }
      else {
        $summary[] = t('Show base price with prefix <em>') . check_markup($settings['prefix'], $text_format) . t('</em> and suffix <em>') . check_markup($settings['suffix'], $text_format) . '</em>';
      }
    break;
  }
  
  return implode('<br />', $summary);
}

function MYMODULE_field_formatter_prepare_view($entity_type, $entities, $field, $instances, $langcode, &$items, $displays) {
  // TODO: Loop over the instances and pass them to this hook individually so we
  // can enforce prices displaying with components as not being altered.

  // Allow other modules to prepare the item values prior to formatting.
  foreach (module_implements('commerce_price_field_formatter_prepare_view') as $module) {
    $function = $module . '_commerce_price_field_formatter_prepare_view';
    $function($entity_type, $entities, $field, $instances, $langcode, $items, $displays);
  }
}



function MYMODULE_field_formatter_view($entity_type, $entity, $field, $instance, $langcode, $items, $display) {
  $element = array();
  // Loop through each price value in this field.
  foreach ($items as $delta => $item) {
    // Theme the display of the price based on the display type.
    switch ($display['type']) {

        case 'commerce_price_prefix_suffix_vat':
          $markup = '';
		  $markuptekst ='';
          $text_format = empty($display['settings']['text_format']) ? NULL : $display['settings']['text_format'];

          if (!empty($display['settings']['prefix'])) {
            $markup .= '<span class="price_prefix">' . check_markup($display['settings']['prefix'], $text_format) . '</span> ';
          }

          $markup .= commerce_currency_format($item['amount'], $item['currency_code'], $entity);



          if (!empty($display['settings']['suffix']) || $display['settings']['show_vat']) {
            $markup .= ' <span class="price_suffix">';
			if($display['settings']['show_vat']) {
				$markuptekst .=  MYMODULE_format_vat($item);
				}
			if(!empty($display['settings']['suffix'])) {
				$markuptekst .= $display['settings']['suffix'];
				}
			$markup .= check_markup($markuptekst, $text_format) . '</span>';

          }

          $element[$delta] = array(
            '#markup' => $markup,
          );
        break;

    }
  }

  return $element;
}

function MYMODULE_format_vat($price) { 

	$taxtext = t('Excluding VAT') ;
	$price_vat = $price;

	//load list of vat rates
	$vatrates = commerce_tax_rates();
	
	//itterate trough list:
	foreach ($vatrates as $name => $vatinfo) {
		// Get taxcomponent
		$name =	'tax|'.$name;
		$tax_component = commerce_price_component_load($price_vat, $name);
		$rate = $vatinfo['rate']  * 100;
		if($rate > 0) {
			if(!empty($tax_component)) {
			$taxtext = t('Including !rate% VAT', array('!rate' => $rate, )) ;
			}
		}
	}
	return $taxtext;
}