All values can be entered as positive and then use IIf() in Sum to identify those that should be negative.
Sum(Price * IIf([TxnType]="Checkout", -1, 1))
All values can be entered as positive and then use IIf() in Sum to identify those that should be negative.
Sum(Price * IIf([TxnType]="Checkout", -1, 1))
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