JSFiddle - React, Tailwind, and code Playground
HTML
<form name="form" action="order.php" method="post">
Please select Amount:<br />
<input type="radio" name="amount" value="25" id="25" /> <label for="25">$25</label><br />
<input type="radio" name="amount" value="50" id="50" /> <label for="50">$50</label><br />
<input type="radio" name="amount" value="75" id="75" /> <label for="75">$75</label><br />
<input type="radio" name="amount" value="100" id="100" CHECKED /> <label for="100">$100</label><br />
<input type="radio" name="amount" value="200" id="200" /> <label for="200">$200</label><br />
<input type="submit" value="Submit">
</form>