title: Conditional free shipping based on shipping class and minimal amount in Woocommerce
body: <p>In woocommerce regarding Shipping methods, I am trying to have the following:</p>
  
  <ul>
  <li>Products A only in cart: set with "Free shipping"</li>
  <li>Products B only in cart: set with:
  
  <ul>
  <li>Flat rate amount of 15 if Products B purchased amount is less than 200</li>
  <li>Free shipping if Products B purchased amount reaches 200 or more..</li>
  </ul></li>
  <li>Products A + Products B are in cart at the same time: "Free Shipping" without any amount restriction.</li>
  </ul>
  
  <p>I have tried by using flat rate and shipping classes I am getting like if product A and product B is there then if the cart doesn't reach 200 it is taking 15 shipping charge.</p>
  
  <p>Any help is appreciated.</p>