Hi,
It's supposed to be the price of the master product. It's calculated with the code:
$priceUsed = 0;
$unit_price = false;
if(!empty($this->row->prices)) {
foreach($this->row->prices as $price) {
if(!isset($price->price_min_quantity) || !empty($this->cart_product_price) || $unit_price)
continue;
if($price->price_min_quantity <= 1)
$unit_price = true;
$name = 'price_value';
if($this->params->get('price_with_tax'))
$name = 'price_value_with_tax';
if(!$unit_price && $price->$name > $priceUsed)
continue;
$priceUsed = $price->$name;
}
}
in the file "show" of the view "product".
Please double check that its price is 13.45 with tax and not without taxes.
However, in your case, when you display the characteristics in "list" mode and with different prices for different variants, I think it makes sense that the price with options should be 0 when no options are applied. To do that, you can add such code after the code I posted above:
if(!empty($this->displayVariants['prices']) && $this->params->get('characteristic_display') == 'list') {
$priceUsed = 0;
}