JSFiddle - React, Tailwind, and code Playground

HTML

<div class="payment-breakdown">
  <span class="totalAmount">Total:</span>
  <span class="totalAmount-dd">100USD</span>
  <span class="oldTotal">Previously paid:</span>
  <span class="oldTotal-dd">50USD</span>
  <span class="totalDue">Amount Due:</span>
  <span class="totalDue-dd">50USD</span>
</div>

CSS

.payment-breakdown span{
  display: block;
  width: 50%;
  float: left;
}