We have a store that sells 20 different flavors of Balsamic Vinegars in 2 different sizes of containers. What we want to do is sell a 4 pack of each individual size, and have the option of the customer choosing 4 out of the 20 flavors for there individual 4 pack purchase. I have set up 4 different characteristic with 20 flavors on each one. The problem is, I can get 2 of these to publish, but if I try 3 or 4, I get a memory limit error. How do we set up 4 different options with 20 choices each for this type of sale?