title: Firebase dashboard doesn't show price in top products
body: <p>In the Firebase dashboard, when looking at the add_to_cart event, I can see the price parameter firing with values succesfully: 
  <a href="https://i.stack.imgur.com/gHbGA.png" rel="nofollow noreferrer"><img src="https://i.stack.imgur.com/gHbGA.png" alt="enter image description here"></a></p>
  
  <p>But then below, in the "top products" window, I cannot see any prices:
  <a href="https://i.stack.imgur.com/NYegs.png" rel="nofollow noreferrer"><img src="https://i.stack.imgur.com/NYegs.png" alt="enter image description here"></a></p>
  
  <p>I'm trying to understand why. Is it because I'm not sending the value parameter (I'm only sending the price and currency)
  Thanks</p>