I've been asked for a solution to the following problem:
my client wants to sell jars of Salsa, but only in a full case i.e. 12 Jars. They have 5 different types, ranging from hot, to mild to medium etc. etc.
So as long as the quantity of all the salsa products is dividable by 12 then they will be allowed, otherwise some type of warning message will be posted.
Anybody done something like this before?
Thanks in advance,