Removing Total (excluding tax) from invoice

When I remove these lines from admin/invoice.php:

Code:

<tr> <td><table border="0" width="100%" cellspacing="0" cellpadding="2"> <tr class="dataTableHeadingRow"> <td class="dataTableHeadingContent" colspan="2"><?php echo TABLE_HEADING_PRODUCTS; ?></td> <td class="dataTableHeadingContent"><?php echo TABLE_HEADING_PRODUCTS_MODEL; ?></td> <td class="dataTableHeadingContent" align="right"><?php echo TABLE_HEADING_TAX; ?></td> <td class="dataTableHeadingContent" align="right"><?php echo TABLE_HEADING_PRICE_EXCLUDING_TAX; ?></td> <td class="dataTableHeadingContent" align="right"><?php echo TABLE_HEADING_PRICE_INCLUDING_TAX; ?></td> <td class="dataTableHeadingContent" align="right"><?php echo TABLE_HEADING_TOTAL_EXCLUDING_TAX; ?></td> <td class="dataTableHeadingContent" align="right"><?php echo TABLE_HEADING_TOTAL_INCLUDING_TAX; ?></td> </tr> <?php for ($i = 0, $n = sizeof($order->products); $i < $n; $i++) { echo ' <tr class="dataTableRow">' . "\n" . ' <td class="dataTableContent" valign="top" align="right">' . $order->products[$i]['qty'] . ' x</td>' . "\n" . ' <td class="dataTableContent" valign="top">' . $order->products[$i]['name']; if (isset($order->products[$i]['attributes']) && (($k = sizeof($order->products[$i]['attributes'])) > 0)) { for ($j = 0; $j < $k; $j++) { echo '<br><nobr><small> <i> - ' . $order->products[$i]['attributes'][$j]['option'] . ': ' . nl2br(zen_output_string_protected($order->products[$i]['attributes'][$j]['value'])); if ($order->products[$i]['attributes'][$j]['price'] != '0') echo ' (' . $order->products[$i]['attributes'][$j]['prefix'] . $currencies->format($order->products[$i]['attributes'][$j]['price'] * $order->products[$i]['qty'], true, $order->info['currency'], $order->info['currency_value']) . ')'; if ($order->products[$i]['attributes'][$j]['product_attribute_is_free'] == '1' and $order->products[$i]['product_is_free'] == '1') echo TEXT_INFO_ATTRIBUTE_FREE; echo '</i></small></nobr>'; } } echo ' </td>' . "\n" . ' <td class="dataTableContent" valign="top">' . $order->products[$i]['model'] . '</td>' . "\n"; echo ' <td class="dataTableContent" align="right" valign="top">' . zen_display_tax_value($order->products[$i]['tax']) . '%</td>' . "\n" . ' <td class="dataTableContent" align="right" valign="top"><b>' . $currencies->format($order->products[$i]['final_price'], true, $order->info['currency'], $order->info['currency_value']) . ($order->products[$i]['onetime_charges'] != 0 ? '<br />' . $currencies->format($order->products[$i]['onetime_charges'], true, $order->info['currency'], $order->info['currency_value']) : '') . '</b></td>' . "\n" . ' <td class="dataTableContent" align="right" valign="top"><b>' . $currencies->format(zen_add_tax($order->products[$i]['final_price'], $order->products[$i]['tax']), true, $order->info['currency'], $order->info['currency_value']) . ($order->products[$i]['onetime_charges'] != 0 ? '<br />' . $currencies->format(zen_add_tax($order->products[$i]['onetime_charges'], $order->products[$i]['tax']), true, $order->info['currency'], $order->info['currency_value']) : '') . '</b></td>' . "\n" . ' <td class="dataTableContent" align="right" valign="top"><b>' . $currencies->format($order->products[$i]['final_price'] * $order->products[$i]['qty'], true, $order->info['currency'], $order->info['currency_value']) . ($order->products[$i]['onetime_charges'] != 0 ? '<br />' . $currencies->format($order->products[$i]['onetime_charges'], true, $order->info['currency'], $order->info['currency_value']) : '') . '</b></td>' . "\n" . ' <td class="dataTableContent" align="right" valign="top"><b>' . $currencies->format(zen_add_tax($order->products[$i]['final_price'], $order->products[$i]['tax']) * $order->products[$i]['qty'], true, $order->info['currency'], $order->info['currency_value']) . ($order->products[$i]['onetime_charges'] != 0 ? '<br />' . $currencies->format(zen_add_tax($order->products[$i]['onetime_charges'], $order->products[$i]['tax']), true, $order->info['currency'], $order->info['currency_value']) : '') . '</b></td>' . "\n"; echo ' </tr>' . "\n"; } ?> <tr> <td align="right" colspan="8"><table border="0" cellspacing="0" cellpadding="2"> <?php for ($i = 0, $n = sizeof($order->totals); $i < $n; $i++) { echo ' <tr>' . "\n" . ' <td align="right" class="'. str_replace('_', '-', $order->totals[$i]['class']) . '-Text">' . $order->totals[$i]['title'] . '</td>' . "\n" . ' <td align="right" class="'. str_replace('_', '-', $order->totals[$i]['class']) . '-Amount">' . $order->totals[$i]['text'] . '</td>' . "\n" . ' </tr>' . "\n"; } ?> </table></td> </tr> </table></td> </tr> <tr>

I get rid of the column Total excl. tax column, but now my Price incl. tax is the same as the Price excl. tax (I am talking about the amount), why is this happening?

thanx