JSFiddle - React, Tailwind, and code Playground

HTML

<script src="~/lib/jquery/dist/jquery.js"></script>
<script src="~/lib/jquery/dist/jquery.min.js"></script>
<script src="~/lib/jquery-validation/dist/jquery.validate.min.js"></script>
<script src="~/lib/jquery-validation-unobtrusive/jquery.validate.unobtrusive.min.js"></script>
<script src="https://ajax.googleapis.com/ajax/libs/jquery/3.3.1/jquery.min.js"></script>
<script type="text/javascript">
   $(function () {
       $("#Coin0").click(Coin0);
   });
   $(function () {
       $("#Coin1").click(Coin1);
   });
   $(function () {
       $("#Coin2").click(Coin2);
   });
   $(function () {
       $("#Coin3").click(Coin3);
   });
   
   $(document).ready(function () {
       Sum += 10;
       $('input[name="SumMoney"]').val(parseInt(Sum) + parseInt($('output[name="result"]').text()));
   
   });
   
   
   document.addEventListener('DOMContentLoaded', _ => {
       document.querySelectorAll('.btn').forEach(_ => {
           const ot = _.parentNode.querySelector('.total');
           _.addEventListener('click', _ => {
               const o = _.target;
               if (o.tagName !== 'BUTTON') return;
               const val = +ot.value + +o.value;
               ot.value = val;
               ot.setAttribute('value', val);
           });
       });
   });
   
   var count1 = 1;
   var count2 = 1;
   var count5 = 1;
   var count10 = 1;
   
   function myFunction(item) {
       if (item == 1) {
           document.getElementById("coin_1").setAttribute('value', count1++);
       }
       else if (item == 2) {
           document.getElementById("coin_2").setAttribute('value', count2++);
       }
       else if (item == 5) {
           document.getElementById("coin_3").setAttribute('value', count5++);
       }
       else if (item == 10) {
           document.getElementById("coin_4").setAttribute('value', count10++);
       }
   }
   
   
   $(document).ready(function () {
       $(_ => {
           const o = $('.total');
           o.on('input', e => {
              ...