Bar graphic with 3 variables

[eginer]

Hello,

 

I'm new in the forum. Sorry for my english... i'm Spanish.

 

I'm creating a DB to manage the energy of my customers. They give me the invoice of the electric company and i put the values in my filemaker database.

 

I have a table with: ID_Customer, Date of invoice and Energy. In the other hand i have a layout called 'clients'. In this layout i have all the information of the client.

 

I want to graph the energy consumed by the client in the last 12 invoices sorted by date. X-axis: date of invoice, Y-axis: energy

 

Thanks in advance.