Comments about WEST System WEST System 320 Scale:
Seems like they could have built the calculator into it for an extra buck or two, as it is you need to work with two instruments.
Maybe it's just the one I got, but it sometimes seems to shut off (power saving feature) too early. This can ruin your batch unless you happen to remember the number displayed as it shuts down, then do some quick thinking to recover.
Still, a decent kit for the money and saves getting (even more) goo all over my 30 year old lab balance. Takes up much less bench space too.