title: Conditional progressive percentage discount based on cart item count in Woocommerce
body: <p>I would like to have a conditional progressive discount based on number of items in cart. After you added 2 products to the cart, you get a discount. More products you add and more discount you get.</p>
  
  <p>For example:</p>
  
  <ul>
  <li>1 product – full price (No Discount)</li>
  <li>2 products – full price with 5% discount of the combined price</li>
  <li>3 products – full price with 10% discount of the combined price</li>
  <li>4 products – full price with 15% discount of the combined price</li>
  <li><em>And so on …</em></li>
  </ul>
  
  <p>I have search over internet without any success. When searching about discounts I just fall on WooCommerce coupon feature or I get some old wrong code…</p>
  
  <p>Any idea? How can I do it?</p>
  
  <p>Is it possible?</p>
  
  <p>Thanks.</p>