Sheet A ('Customers Alignment'):
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column A- name of sales representative
column B - customer ID
(Not sorted in any particular order. So, a sales rep could be listed in row
5, 27, etc)

Sheet B ('Sales Rep Lists'):
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cell 'A1' drop-down selection of sales rep name.
I need below that to list the customers of the sales rep selected in cell
A1. Can this be done with a single formula (maybe with an Vlookup and/or an
Offset?)