JSFiddle - React, Tailwind, and code Playground

HTML

<table>
    <tr class="parent-realtor percent-text">
        <td>
            <h5>Realtor Percent</h5>
        </td>
        <td>
            <input type="text" class="percent-total" />
            <input type="text" onfocus="this.blur()" class="percent-data" />
        </td>
        <td>
            <input type="text" class="percent-total" />
            <input type="text" onfocus="this.blur()" class="percent-data" />
        </td>
        <td>
            <input type="text" class="percent-total" />
            <input type="text" onfocus="this.blur()" class="percent-data" />
        </td>
        <td>
            <input type="text" class="percent-total" />
            <input type="text" onfocus="this.blur()" class="percent-data" />
        </td>
    </tr>
    <tr>
        <td>
            <h6>Contract Amount</h6>
        </td>
        <td>
            <input type="text" data-parent="realtor" />
        </td>
        <td>
            <input type="text" data-parent="realtor" />
        </td>
        <td>
            <input type="text" data-parent="realtor" />
        </td>
        <td>
            <input type="text" data-parent="realtor" />
        </td>
    </tr>
    <tr class="percent-text">
        <td>
            <h6>Buyer's Agent</h6>
        </td>
        <td>
            <input type="text" data-parent="realtor" class="percent" />
            <input type="text" data-parent="realtor" class="percent-data r" onfocus="this.blur()" />
        </td>
        <td>
            <input type="text" data-parent="realtor" class="percent" />
            <input type="text" data-parent="realtor" class="percent-data r" onfocus="this.blur()" />
        </td>
        <td>
            <input type="text" data-parent="realtor" class="percent" />
            <input type="text" data-parent="realtor" class="percent-data r" onfocus="this.blur()" />
        </td>
        <td>
            <input type="text" data-parent="realtor" class="percent" />
            <input type="text"...

CSS

table input {
    width: 50px;
}

table h5, h6 {
    width: 55px;
}
.percent, .percent-total {
    width:20px
}
.percent-data {
    width:50px
}

JavaScript

$('.percent').on('keyup', function () {
    //calcRealtor();
    var totals = [0, 0, 0, 0, 0, 0, 0, 0],
        parent_name = $(this).data('parent'),
        find_parent_row = $('tr.parent-realtor');
    find_parent_row.nextUntil('[class="parent-realtor"]').find('input[data-parent="realtor"]').each(function () {
        totals[$(this).parent('td').index() / 1 - 1] += +this.value;
    });
    find_parent_row.find('input').each(function (i) {
        this.value = totals[i];
    });

});