JSFiddle - React, Tailwind, and code Playground

HTML

<table id="MainContent_gvOrders">
	<tr>
		<td>
			<input type="checkbox" /> 12
		</td>
	</tr>
	<tr>
		<td>
			<input type="checkbox" checked="checked" />10
		</td>
	</tr>
	<tr>
		<td>
			<input type="checkbox" />25
		</td>
	</tr>
</table>

JavaScript

var sum = 0;
$('#MainContent_gvOrders  tr:has("input:not(:checked)")').filter(function(){
     return sum += parseInt($(this).find('td').text(),10);
});

alert(sum);