Charles' comment below is a valid one, we currently have every item weighed as "one unit including packaging" rounded up to the next 5g (to account for extra . We manually adjust the weight for combined items. So in our case being able to adjust the weight manually for combined items works. If this can be automated somehow, to say a global setting where it applies a rule like: "take away x grams for every extra unit above y unit(s)" from total weight, and the same for "every extra order".
Charles' comment below is a valid one, we currently have every item weighed as "one unit including packaging" rounded up to the next 5g (to account for extra . We manually adjust the weight for combined items. So in our case being able to adjust the weight manually for combined items works. If this can be automated somehow, to say a global setting where it applies a rule like: "take away x grams for every extra unit above y unit(s)" from total weight, and the same for "every extra order".