I'm with James and Jack -- we would find this functionality to be very
helpful as well, as customers often change (or add to) their order by
phone long after the original order is created. Obviously this can be
done with a manual order (that is then ...
An automation rule (with math!) would be very helpful for us. We
currently use a "deductible" with our shipping, so we don't insure
anything below a certain threshold and we also deduct that from the
total sales price of packages above the threshold....