amount1 quantity1 quantity2 zzz
Material 1 100 10 20 = 100*20/10
Material 2 40 8 25 = 40*25/8
Tot Mat gr
the system calculate total fot Mat gr like
(sum amount1/sum quantity1)*sum quantity2
I want to calculate (before agrregation) like
10020/10 + 4025/8
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