Column Chart with Stacked and Unstacked in same series - HOW??

Hi there,

Working with goals in my sales organisation I am able to show (Target (Budget), Target (Forecast), Invoice (Subtotal), Orders (Subtotal)

Orders are my in progress revenues in this case

I want the chart by sales person to show

1 column for budget

1 column for forecast

1 stacked column with both invoices and orders

all three side by side

i cannot figure this out...any suggestions?

thanks