Please read the following table in HTML format from a webpage and then answer the question in detail according to the table. Each table cell is defined by a <td> and a </td> tag. Each table row starts with a <tr> and ends with a </tr> tag. 'rowspan=m' and 'colspan=n' represents a cell spaning over 'm' rows and 'n' columns.

Webpage title:
SM UB-46
Table title:
Ships sunk
Table:
<table id='hittask' contenteditable='False'>
<tr> <th colspan=1 rowspan=1 > Date </th><th colspan=1 rowspan=1 > Name </th><th colspan=1 rowspan=1 > Nationality </th><th colspan=1 rowspan=1 > Tonnage </th><th colspan=1 rowspan=1 > Fate </th></tr>
<tr> <td colspan=1 rowspan=1 > 2 August 1916 </td><td class="highlighted"  colspan=1 rowspan=1 > Kohina Maru </td><td colspan=1 rowspan=1 > Japan </td><td colspan=1 rowspan=1 > 3,164 </td><td class="highlighted"  colspan=1 rowspan=1 > Sunk </td></tr>
<tr> <td colspan=1 rowspan=1 > 9 August 1916 </td><td class="highlighted"  colspan=1 rowspan=1 > Basileios </td><td colspan=1 rowspan=1 > Greece </td><td colspan=1 rowspan=1 > 488 </td><td class="highlighted"  colspan=1 rowspan=1 > Sunk </td></tr>
<tr> <td colspan=1 rowspan=1 > 2 October 1916 </td><td class="highlighted"  colspan=1 rowspan=1 > Huntsfall </td><td colspan=1 rowspan=1 > United Kingdom </td><td colspan=1 rowspan=1 > 4,331 </td><td class="highlighted"  colspan=1 rowspan=1 > Sunk </td></tr>
<tr> <td colspan=1 rowspan=1 > 7 November 1916 </td><td class="highlighted"  colspan=1 rowspan=1 > Melanie </td><td colspan=1 rowspan=1 > Russian Empire </td><td colspan=1 rowspan=1 > 116 </td><td class="highlighted"  colspan=1 rowspan=1 > Sunk </td></tr>
<tr> <td colspan=1 rowspan=1 >  </td><td colspan=1 rowspan=1 >  </td><td colspan=1 rowspan=1 > Total: </td><td class="highlighted"  colspan=1 rowspan=1 > 8,099 </td><td colspan=1 rowspan=1 >  </td></tr>
</table>
Question:
How much weight was sunk by SM UB-46?
Answer:
SM UB-46 sank four ships (the Kohina Maru, the Basileios, the Huntsfall, and the Melanie) for a total weight of 8,099 tons.