title: How to save bool to PlayerPrefs Unity
body: <p>I have a payment system for my game set up here's my code :</p>
  
  <pre><code> void Start()
   {
       T55.interactable = false;
       Tiger2.interactable = false;
       Cobra.interactable = false;
   }
  
   public void ProcessPurchase (ShopItem item)
   {
       if(item .SKU =="tank")
       {
           StoreHandler .Instance .Consume (item );
       }
   }
  
   public void OnConsumeFinished (ShopItem item)
   {
       if(item .SKU =="tank")
       {
           T55.interactable = true;
           Tiger2.interactable = true;
           Cobra.interactable = true;
       }
   }
  </code></pre>
  
  <p>Now each time the player buy something in the game the intractability of my 3 buttons goes to true; but the problem is each time he closes the game the intractability goes back to false how.</p>
  
  <p>Should I save the process so the player doesn't have to buy again to set them back to true?</p>