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:
Sidetur
Table title:
Production
Table:
<table id='hittask' contenteditable='False'>
<tr> <th colspan=1 rowspan=2 > Process </th><th colspan=7 rowspan=1 > Plant </th><th colspan=1 rowspan=2 > Total </th></tr>
<tr> <th colspan=1 rowspan=1 > Casima </th><th colspan=1 rowspan=1 > Antímano </th><th colspan=1 rowspan=1 > Guarenas </th><th colspan=1 rowspan=1 > Valencia </th><th colspan=1 rowspan=1 > Lara </th><th colspan=1 rowspan=1 > Barquisimeto </th><th colspan=1 rowspan=1 > Collection Centers </th></tr>
<tr> <td colspan=1 rowspan=1 > Steelmaking </td><td colspan=1 rowspan=1 > 460,000 </td><td colspan=1 rowspan=1 >  </td><td colspan=1 rowspan=1 >  </td><td colspan=1 rowspan=1 >  </td><td colspan=1 rowspan=1 >  </td><td colspan=1 rowspan=1 > 375,000 </td><td colspan=1 rowspan=1 >  </td><td class="highlighted"  colspan=1 rowspan=1 > 835,000 t/year </td></tr>
<tr> <td colspan=1 rowspan=1 > Rolling </td><td colspan=1 rowspan=1 >  </td><td colspan=1 rowspan=1 > 340,000 </td><td colspan=1 rowspan=1 > 75,000 </td><td colspan=1 rowspan=1 >  </td><td colspan=1 rowspan=1 > 60,000 </td><td colspan=1 rowspan=1 > 140,000 </td><td colspan=1 rowspan=1 >  </td><td class="highlighted"  colspan=1 rowspan=1 > 615,000 t/year </td></tr>
<tr> <td colspan=1 rowspan=1 > Electric Welding </td><td colspan=1 rowspan=1 >  </td><td colspan=1 rowspan=1 >  </td><td colspan=1 rowspan=1 >  </td><td colspan=1 rowspan=1 > 67,000 </td><td colspan=1 rowspan=1 >  </td><td colspan=1 rowspan=1 >  </td><td colspan=1 rowspan=1 >  </td><td class="highlighted"  colspan=1 rowspan=1 > 67,000 t/year </td></tr>
<tr> <td colspan=1 rowspan=1 > Ferrous Material Collection </td><td colspan=1 rowspan=1 >  </td><td colspan=1 rowspan=1 >  </td><td colspan=1 rowspan=1 >  </td><td colspan=1 rowspan=1 >  </td><td colspan=1 rowspan=1 >  </td><td colspan=1 rowspan=1 >  </td><td colspan=1 rowspan=1 > 600,000 </td><td colspan=1 rowspan=1 > 600,000 t/year </td></tr>
</table>
Question:
How many tons of steelmaking, rolling and electric welding does Sidetur have?
Answer:
Sidetur has 835,000 tons of steelmaking, 615,000 tons of rolling and 67,000 of electric welding.