try this.
=Sum([Material Age bt 0-30]) ForEach([L01 Material Group];[L01 Plant]) * Sum([Price]) ForEach([L01 Material Group];[L01 Plant])
try this.
=Sum([Material Age bt 0-30]) ForEach([L01 Material Group];[L01 Plant]) * Sum([Price]) ForEach([L01 Material Group];[L01 Plant])