If the form got redone, then this is exactly what we would do on paper. Make it more simple. With the current form, why do we need to write out the individual zone weights? If there are 5 pax in zone X, anyone can tell there is X weight in that zone. We could have the whole form done before the FA got us the zone numbers and then just copy her/his page and tear off. Seems it would be more time efficient. I am slower with a calculator than without. My fat fingers always punch the wrong numbers so I have to go back 1 step. My fault, but it still takes me longer.
I do have the weights done before the FA gives us the zone count. 32 passengers weighs the same no matter where they're sitting. When I get the sheet from the FA, I just fill in the blanks.