If(drpbusiness.Selected.Value = "Water",ThisItem.'Amount',Parent.Default,
If(
drpbusiness.Selected.Value = "Fire",
Sum(
Value(DataCardValue26.Text),
Value(DataCardValue28.Text),
Value(DataCardValue36.Text),
Value(DataCardValue39.Text),
Value(DataCardValue40.Text),
Value(DataCardValue42.Text)
))