title: Making the +/- Plus and Minus quantity button go up in increments of 12 in WooCommerce
body: <p>I have been trying to solve what I thought might be an easy fix but I can't seem to find any information anywhere.</p>
  
  <p>My problem is this:</p>
  
  <p>I am setting up a wholesale store using WooCommerce with the min/max quantity and wholesale store plugins. I want to show a simple product with its single unit price (no problem) but as all products in the store are wholesale they can only be sold in (multiples) cartons of 6 or 12.</p>
  
  <p>The min/max plugin allows me to set a minimum order quantity (say 12 items) but when I click on the -/+ Minus and Plus quantity selector to add another carton (another 12 items) it only adds one number (single item) at a time... E.g. 13, 14, 15, 16 and so on.</p>
  
  <p>So my question is... "Is it possible to modify the 'quantity.php' file so the order quantities only go up in increments of 12?" (E.g. 12, 24, 36, 48, etc.)</p>
  
  <p>I know I could simply set up and show the single carton cost as a simple product or do variables but my client wants to show a per unit price.</p>
  
  <p>Thanks in advance for any feedback you may have.</p>