When you have a large number of items grouped together and some have min order quantities and multiples of order qtys if just one of those items has an incorrect qty inserted (ie not divisible by the multiples order qty) and you add to cart all the items with qtys are rejected and the default qtys restored. This means the qtys for all the items you wished to order need to be redone.besides being very frustrating it is unproductive and may result in items not being ordered). How do you identify the error at the time of inputting each item qty before proceeding to the next item.