Hi, Newbie here and not good at code, hope you can help.
I have 2 tables, there is a lot more to the tables that is not relevant so I have presented a simplified version just to explain what i need.
1st table has 2 columns a list of containers in the 1st and how much is in each container in the 2nd
2nd table has 3 columns, in the 2nd column i can select multiple containers from the 1st table in a single box, 3rd column i want it to display the total contents of the selected containers in the previous box.
example Table 1
1   cont1     50L
2   cont2     175L
3   cont3      25L
4   cont4     50L
example Table 2
1,3         75L
2,4         125L
Hope this makes sense
Cheers
Vince
