Each row is like:

<tr><td id="123">Tan Ah Kow</td><td class="r"><a href="/ab">123.2</a></td><td class="r">55</td></tr>

<tr><td id="234">Tan Ah Kow</td><td class="r"><a href="/ab">123.2</a></td><td class="r">65</td></tr>

1. Get the 123 and 234 of the id attribute in the first column.

2. Get the innerText of the first column.

3. Get the href value of the second column.

4. Get the innerText of each third column and sum them all up.