Circular Reference??

I am having some trouble with inserting a formula into one of my spreadsheets. Attached is the spreadsheet I am using. When I try to add the average formula for the seafood part in the 'Automatic Calculations' spreadsheet, I get a circular reference error.

I am not sure, but I think the problem might have something to do with the formula I am testing with SUMPRODUCT in the sumproduct test I am doing.

Any help is appreciated,
Dan

I guess you are writing 2 formulae in c10 of automatic caliculations sheet and b12 in costing which inturn caliculates with each other cells. Hence result is circular reference. Change the formulae. So your caliculation will be done