Multiple values in one field Sum up in another cell

[Site_Team]

if i place a order for example 500 and then it is part shipped in 5 deliveries resulting in 5 invoices . can i have all involves values in one cell ( 100+100+100+100 ) this is then sum into new cell giving me a value of 400. i dont want to be creating new columns for every part invoice . as some order may come in anything up to 10 part shipments

[Raminder_Singh]

Hi @Site_Team,

I think you are modeling your data wrong. You can do something like this:

1. Create two tables – Orders and Invoices.
   
   
2. The Orders table links to the Invoices table
   
3. Add a roll up field in the Orders table.