In a Customer Report, each row of the Amount column only copies the non-blank column (a Credit or Debit) to its left.  This adds no information or insight.  What I believe almost all users would want is to see the running balance, the sum of all Credits and Debits through this row;  so if the credits and debits completely offset, then the Amount is $0, and a non-$0 amount shows the net owed or credit.

Either the Amount column should be fixed [or fixed and renamed (to "Net" or "Balance", for example)] or else please add an additional "Net" or "Balance" column which does this and allow the Amount column to not be displayed.