JSFiddle - React, Tailwind, and code Playground

HTML

<table>
	<thead>
		<tr>
			<th>2010</th>
			<th>2011</th>
			<th>2012</th>
			<th>2013</th>
            <th>Totals</th>
		</tr>
	</thead>
	<tbody>
		<tr>
			<td>10.5</td>
			<td>10</td>
			<td>10</td>
			<td>10</td>
            <td class="total"></td>
		</tr>
		<tr>
			<td>10</td>
			<td>216</td>
			<td>594</td>
			<td>654</td>
            <td class="total"></td>
		</tr>
		<tr>
			<td>10</td>
			<td>654</td>
			<td>562</td>
			<td>216</td>
            <td class="total"></td>
		</tr>
	</tbody>
</table>

CSS

table {
	margin: 20px 0;
}
table, td {
	border: 1px solid #c0c0c0;
}
td {
	padding: 3px 7px;
}
.total {
	border-color: red;
}

JavaScript

$('tbody tr').each(function() {
	row_total = 0; 
	$(this).find('td:not(.total)').each(function() {
	   row_total += parseInt($(this).text(), 10);
	}); 
	$('.total',this).text(row_total);
});