!!!Problem with adding new variables!!!

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<tr>
   <td><b><?php echo $text_price_without_tax; ?></b></td>
   <td><?php echo $priceWithoutText; ?></td>
          </tr>

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$_['text_price']         = 'Price (with VAT):';
$_['text_price_without_tax']         = 'Price (without VAT):';

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$this->data['text_price_without_tax'] = $this->language->get('text_price_without_tax');

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<td><b><?php echo $text_price_without_tax; ?></b></td>

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<td><b><?php echo $this->language->get('text_price_without_tax'); ?></b></td>

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if ($discount) {
$price = $this->currency->format($this->tax->calculate($discount, $this->config->get('config_tax')));

$priceWithoutTax =  $this->currency->format($this->tax->calculate($discount, $result['tax_class_id'], $this->config->get('config_tax')));

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$this->data['products'][] = array(
            		'name'    => $result['name'],
					'model'   => $result['model'],
            		'rating'  => $rating,
					'stars'   => sprintf($this->language->get('text_stars'), $rating),
					'thumb'   => image_resize($image, $this->config->get('config_image_related_width'), $this->config->get('config_image_related_height')),
            		'price'   => $price,
					'special' => $special,
					'href'    => $this->model_tool_seo_url->rewrite($this->url->http('product/product&product_id=' . $result['product_id']))
          		);

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$this->data['products'][] = array(
            		'name'    => $result['name'],
					'model'   => $result['model'],
            		'rating'  => $rating,
					'stars'   => sprintf($this->language->get('text_stars'), $rating),
					'thumb'   => image_resize($image, $this->config->get('config_image_related_width'), $this->config->get('config_image_related_height')),
            		'price'   => $price,
                    'priceWithoutTax' => $priceWithoutTax,
					'special' => $special,
					'href'    => $this->model_tool_seo_url->rewrite($this->url->http('product/product&product_id=' . $result['product_id']))
          		);