General Sales is an overview with totals for each POS
deaprtment and subtotals for each super department. In this
context, individual departments are only counted once under
their home super department so that the grand total accurately
reflects total sales.
The Use department settings... option may change
line item totals but should not alter the grand total. If an
item used to be in department #1 but now is in department #2,
this option controls where its sales appear in the report.