Suggested transfers

Since changing to multi stock locations we now have suggested transfers, I can see how this will help, but currently it suggests a number based on the amount sold, and doesn’t take in to account box qty, we have a lot of products that are boxed in 6’s but the stand where they are picked from take 9, the option of telling it that when this product gets down to 3 get another box of 6 rather than none box qty.