Hi Mike,

Right, but you want to Total the details to get the total sales for the month, but in the "Total Cell" in the View you don't want to just see the Total of the 12 months, you then want to divide the amount by 12 (which you aren't doing to the details). Is that clearer?

Anyway, it's an interesting challenge and might make a good use study for the GridView Workshop Pre-Conference training at the Adagio Opportunity Conference