JSFiddle - React, Tailwind, and code Playground

HTML

<form oninput="amount.value = parsInt(a.value)*parsInt(b.value)"> <br />
 <b>Sales Summary:</b><br>
 Price = $<input type="number" id="a" ><br />
 Quantity = <input type="number" id="b" >units<br />
 Discount = <input type="number" id="c" min=”0” max=”100”> %<br />
 Net Total Amount = $<output id="amount"for="a b c"></output>
 </form>