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  • In your model, add a new Stream:
  • Hover over Customers in England, and press  - Add a new Stream
  • Give the new Stream the Name: Customer Summary by Region
  • Double-click on the new pipe to open the details form
  • Go to the tab Sort/Group:
    • Drag the Attribute Region from the left-hand box into the list of sorting/ grouping attributes
  • Go to the Aggregate Attributes tab:
    • Press  to add a new aggregate attribute
    • In the new aggregate attribute form:
      • Set the Aggregate Function to Count
      • Leave the Attribute blank
      • Set the New Attribute Name to CountRecords
      • Press 
    • Add another aggregate attribute: press  - Show the list of Attributes
    • Drag the attribute BILLAMOUNT into the aggregate attributes list
      • Note that this already uses the attribute function Sum – leave this as it is
    • Update the name of the aggregate value:
      • Double-click on the new aggregate attribute
        • Update the New Attribute Name to TotalLastBillAmount
        • Press Image Modified
      • Add another aggregate attribute: press Image Modified - Show the list of Attributes
      • Drag the attribute BILLAMOUNT into the aggregate attributes list
      • Update the details for this new aggregate attribute:
        • Double-click on it
        • Update the Aggregate Function to Average
        • Update the New Attribute Name to AvgLastBillAmount
        • Press Image Modified

Now you need to configure your output Stream:

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