i suggest you to add the below script:
IF(Customer='Lenovo' OR Customer = 'Dell' OR Customer = 'HP', 'F3', IF(Customer = 'Acer' OR Customer = 'Motorola', 'F5' ) as FocusGroup
then create the table below:
FocusGroup - Focus
F3 focus 5
F5 focus 5
F3 focus 3
finally uses "Focus" as dimension in your chart object.