title: Woocommerce Table Rate Shipping plugin isn't calculating shipping rates correctly
body: <p>I'm using the <a href="https://docs.woocommerce.com/document/table-rate-shipping/#section-7" rel="nofollow noreferrer">Table Rate Shipping plugin</a> and trying to set rates depending on the number of items in the cart. I have three different types of items (framed, mounted, prints) and I want the rates to apply to only the prints.</p>
  
  <p>For example, I want to set it up so that:</p>
  
  <p>If quantity is 1-3 prints, charge X…
  If the quantity is 4-6 prints, charge 2X…
  If the quantity is 7-9 prints, charge 3X…</p>
  
  <p>Currently, this is how I have my settings, but the rates aren't being calculated correctly. If I put 3 items in my cart, it charges $72 when it should charge $24. For 4 items, it charges $192 when it should charge $48.</p>
  
  <p><a href="https://i.stack.imgur.com/d21sM.jpg" rel="nofollow noreferrer"><img src="https://i.stack.imgur.com/d21sM.jpg" alt="enter image description here"></a></p>
  
  <p>What am I missing?</p>