title: how to change price as correspondence changes occur in qty using jquery/js
body: <p>I have a table having qty and price, A user can change the qty manually by entering any number  OR he can also change the same by pressing + and - button. So I want, subtotal price should be change accordingly without reloading the page as its qty getting change. I dont want to store it in db and that unit price in picture is actually subtotal price which I need to change.</p>
  
  <p>Here is a screen shot for clearly understanding my need:
  <img src="https://i.stack.imgur.com/OHXoL.png" alt="enter image description here"></p>
  
  <p>Already I have spent lot of hours but I could not complete it so please some help me !</p>