Put the unit together: maps of the Juniper Orders data, built on tables you join, relate or filter on the Data Source page.
Each exercise says what the data source needs; decide whether that means a join, a relationship, a blend or a data source filter, and check the level of detail of each table before you sum anything. Then build the view and answer from it, hovering marks for exact values.
Watch the classic traps from the unit: an inner join that drops data, a target summed once per order line, a map of totals that only shows where the customers are.