cost fix (#166)

AzureDataLake/Scripts/Process.usql

@@ -45,13 +45,13 @@ DECLARE @OutputFileStatistics string = @OutputFolder + "statistics-{date:yyyy}-{
     SELECT Timestamp.ToString("yyyy/MM/dd HH:00") AS hour,
            model,
            SUM(HasObservations != 0? (1.0 / (1.0 - pdrop)) : 0) AS obser,
-           SUM(Cost != 0? (1.0 / (1.0 - pdrop)) : 0) AS clicks,
+           SUM(-Cost / (1.0 - pdrop)) AS clicks,
            SUM(1.0 / (1.0 - pdrop)) AS impressions,
-           SUM(Cost != 0 AND Action == 1? (1.0 / (1.0 - pdrop)) : 0) AS clicks1,
+           SUM(Action == 1? (-Cost / (1.0 - pdrop)) : 0) AS clicks1,
            SUM(Action == 1? (1.0 / (1.0 - pdrop)) : 0) AS impressions1,
-           SUM(Cost != 0 AND Action == 1? (1.0 / (1.0 - pdrop)) / Prob : 0) AS clicksIps1,
+           SUM(Action == 1? (-Cost / (1.0 - pdrop)) / Prob : 0) AS clicksIps1,
            SUM(Action == 1? (1.0 / (1.0 - pdrop)) / Prob : 0) AS impressionsIps1,
-           SUM(Cost != 0? (1.0 / (1.0 - pdrop)) / Prob / NumActions : 0) AS clicksIpsR,
+           SUM((-Cost / (1.0 - pdrop)) / Prob / NumActions) AS clicksIpsR,
            SUM((1.0 / (1.0 - pdrop)) / Prob / NumActions) AS impressionsIpsR,
            (SUM(1.0) / SUM(1.0 / (1.0 - pdrop))) AS PassRatio,
            date