title: Magento: Creating an attribute where each option increases the cost
body: <p>I make horse equipment and offer embroidery on almost every item.</p>
  
  <p>I can't seem to figure out how to do an attribute that offers options that increase the cost based on the lettering chosen.</p>
  
  <p>Is this possible, or am I better to offer the embroidery as a separate product altogether?</p>
  
  <p>The embroidery does not affect the weight of the final product.</p>