JSFiddle - React, Tailwind, and code Playground

JavaScript

var string = '<table>\
    <tr>\
        <td class="tbmain" height="25"><b>Total (B)+(C)+(A)</b></td>\
        <td class="tbmain" align="right"><b>100,000</b></td>\
        <td class="tbmain" align="right"><b>111,111,111</b></td>\
        <td class="tbmain" align="right"><b>101,101</b></td>\
    </tr>\
    <tr>\
        <td class="tbmain" height="25"><b>Total (A)+(B)+(C)</b></td>\
        <td class="tbmain" align="right"><b>100,000</b></td>\
        <td class="tbmain" align="right"><b>111,111,111</b></td>\
        <td class="tbmain" align="right"><b>101,101</b></td>\
    </tr>\
    <tr>\
        <td class="tbmain" height="25"><b>Total (C)+(B)+(A)</b></td>\
        <td class="tbmain" align="right"><b>100,000</b></td>\
        <td class="tbmain" align="right"><b>111,111,111</b></td>\
        <td class="tbmain" align="right"><b>101,101</b></td>\
    </tr>\
</table>';

alert($(string).find("tr td:contains('Total (A)+(B)+(C)')").siblings("td:eq(1)").html());