title: How can I keep track of changes made in redux store
body: <p>I do not want to call store.subscribe method. I just want to sync the store state with the component's state.
  <a href="https://i.stack.imgur.com/pPkGw.png" rel="nofollow">I am trying to make a shopping cart</a>
  - There is a component <strong>CartItems</strong> that displays <strong>SignleCartItem</strong> by passing props to SingleCartItem component using map function.</p>
  
  <p>Whenever user updates the quantity SignleCartItem dispatches an action and store saves the total items added to the cart and their price.</p>
  
  <p>Now the problem is that the component that displays SubTotal and Total of the cart items do not sync the state of the store with the its state ( which displays total ). </p>
  
  <h2>Making it simple:</h2>
  
  <blockquote>
    <p>One component updates the store state, other component is not syncing
    it on run time.</p>
  </blockquote>
  
  <p>PS: Please ignore the product detail :P</p>