Simple account keeping

[Luke Daniel]

Hello,

I'm looking to set up an account page and have a simple calculation done for me.

I have a main client table and an accounts table which are link via an ID. In the main client table, I call on the account table in a portal to enter payment information.

I simply want to have filemaker add the payments entered and calculate a balance.

How would I go about creating a calculation?

Cheers

[Luke Daniel]

worked it out.