JSFiddle - React, Tailwind, and code Playground

HTML

<div id="radios">
    Build your own package
    <input type="radio" name="radio" value="1"><br /><br />
        Main Package - Checkbox A,B,C
        <input type="radio" name="radio" value="2"><br /><br />
            Complete Package - ALL SELECTED
            <input type="radio" name="radio" value="3"><br /><br />
</div>

<div id="boxes">
    <input type="checkbox" name="checkboxes[]" value="1">
    <input type="checkbox" name="checkboxes[]" value="2">
    <input type="checkbox" name="checkboxes[]" value="3">
    <input type="checkbox" name="checkboxes[]" value="4">
    <input type="checkbox" name="checkboxes[]" value="5">
</div>
<div id="valuefield">
    <br />Reflective Cost
     <input type="text" name="valuetext" id="input_53_34">

JavaScript

$('input[type=radio]').click(function(){
    console.log(typeof this.value);
    $('input[type="checkbox"]').prop('checked',false);
    switch(this.value) {
        case "2":
            $('input[type=checkbox]:nth-child(1), input[type=checkbox]:nth-child(2),input[type=checkbox]:nth-child(3)').prop('checked',true);
            break;
        case "3":
            $('input[type=checkbox]').prop('checked',true);
            break;

    }
});
$('input[type=checkbox]').click(function(){
    var count = $('input[type=checkbox]:checked').length;
    console.log(count);
    $('input[type=radio]').prop('checked',false);
    switch(count) {
        case 1:
        case 2:
            $('input[type=radio][value=1]').prop('checked',true);
            break;
        case 3:
            $('input[type=radio][value=2]').prop('checked',true);
            break;
        case 4:
             $('input[type=radio][value=1]').prop('checked',true);
            break;
        case 5:
            $('input[type=radio][value=3]').prop('checked',true);
            break;
    }
});

 jQuery(document).ready(function($){$('input[type="checkbox"]').on('change', function() {

        if($('input[type="checkbox"]:lt(5):checked').length == 1) {
            greeting = "50";
        } else if ($('input[type="checkbox"]:lt(5):checked').length == 2) {
          greeting = "100";
        } else if ($('input[type="checkbox"]:lt(5):checked').length == 3) {
           greeting = "125";
        } else if ($('input[type="checkbox"]:lt(5):checked').length == 4) {
            greeting = "155";
        } else if ($('input[type="checkbox"]:lt(5):checked').length == 5) {
    greeting = "170";
        };
        
        document.getElementById("input_53_34").value = greeting;

    });
    });