1.Take read range workbook activity to read the data from your input file, store output as dtInput
2.Use build data table activity and create your three columns with your column names
and create output variable for this activity as dtOutput
3. take assign activity pass that output variable of above activity in To section and in value section pass below expression
(From row In dtInput.AsEnumerable()
Group row By key1 = row(“Search Key”).ToString.Trim,
key2 = row(“Model”).ToString.Trim
Into grp = Group
Let total = grp.Sum(Function(r) Convert.ToInt32(r(“Quantity”)))
Select dtOutput.Rows.Add(key1, key2, total)
).CopyToDataTable()
4.Use write range activity to write the data in new Excel file follow below screenshot