Answer: initially Sam gross profit would drop. But overtime when he starts gaining customers in his new branch added to the already existing customers in his old branch there would a very large gross profit increase.
Explanation: Gross profit is the percentage of revenue a company retains after accounting for cost of goods/services.
In this case payment of staffs in both the old and new branches would be accounted for, with the new branch still very much dependent on the old branch for payment of staff until it can get its own customers, only then would the new branch be able to be self reliant and also make profit.