The file we extended from magento base theme. I checked the line 322 in the file it have code:
<span class=”label”><?php echo $this->helper(‘tax’)->__(‘Incl. Tax:’) ?></span>
<span class=”price” id=”price-including-tax-<?php echo $_id ?><?php echo $this->getIdSuffix() ?>”>
<?php echo $_coreHelper->formatPrice($_finalPriceInclTax + $_weeeTaxAmountInclTaxes, false) ?>
If you have problem about memory, please try to increase memory size in php.ini file. Also try to enable system error logs in admin > system > configuration > Developer to see detail of problem and find solution to fix it.