JSFiddle - React, Tailwind, and code Playground

HTML

<table class="table table-bordered tablecool">
<thead>
<tr>
<th>Марка</th>
<th>Вид</th>
<th>Цена</th>
<th>1</th>
</tr>
</thead>
<tbody>
<tr>
<td class="title_centerzag" style="text-align: right;" colspan="5"><em></em></td>
</tr>
<tr class="black-block1">
<td class="title_center">3А</td>
<td class="title_center">
<div class="lms__main-shlop">
<div class="lms__m-header-shlop"><span class="kkl_df">Позиция</span></div>
<div class="lms__m-body-shlop">
</div>
</div>
<div class="th-mobile"></div>
</td>
<td class="title_center">1500</td>
<td class="title_center">0</td>
</tr>
<tr class="black-block2">
<td class="title_center">5А</td>
<td class="title_left">
<div class="lms__main-shlop">
<div class="lms__m-header-shlop"><span class="kkl_df">Позиция</span></div>
<div class="lms__m-body-shlop">
</div>
</div>
<div class="th-mobile"></div>
</td>
<td class="title_center">1500</td>
<td class="title_center">0</td>
</tr>
<tr class="black-block3">
<td class="title_center">12А</td>
<td class="title_left">
<div class="lms__main-shlop">
<div class="lms__m-header-shlop"><span class="kkl_df">Позиция</span></div>
<div class="lms__m-body-shlop">
</div>
</div>
<div class="th-mobile"></div>
</td>
<td class="title_center">1450</td>
<td class="title_center">0</td>
</tr>
<tr class="black-block4">
<td class="title_center">12АЦ</td>
<td class="title_left">
<div class="lms__main-shlop">
<div class="lms__m-header-shlop"><span class="kkl_df">Позиция</span></div>
<div class="lms__m-body-shlop">
</div>
</div>
<div class="th-mobile"></div>
</td>
<td class="title_center">1450</td>
<td class="title_center">0</td>
</tr>
<tr class="black-block5">
<td class="title_center">17А</td>
<td class="title_left">
<div class="lms__main-shlop">
<div class="lms__m-header-shlop"><span class="kkl_df">Позиция</span></div>
<div class="lms__m-body-shlop"></div>
</div>
<div class="th-mobile"></div>
</td>
<td class="title_center">1450</td>
<td class="title_center">0</td>
</tr>
<tr class="black-block6">
<td...

JavaScript

function pseudo_random( _date, min, max ){ 
  current_date = _date.toISOString().slice(0, 10);
  var lms_constant = String(current_date);
  var lms_b1 = min + ( parseInt(lms_constant, 16) % ((max + 1) - min))
  return lms_b1;
}

function roundTo5(num) {
 return Math.round(num/5)*5;
}


var lms_bb = pseudo_random( new Date(), 100, 300);
var lms_bbb = roundTo5(lms_bb);
var addend = lms_bbb;

jQuery('.tablecool tr[class*="black-block"] .title_center:nth-last-child(2)').each(function () {
    var jQuerythis = jQuery(this);
    var price = jQuerythis.text();
    var sum = parseInt(price) + lms_bbb;
    jQuerythis.text(sum);
});


alert( lms_bbb );