We had a report built under PHPR 4.2 that would show sales by month and give the total for that month (sum), and an average per order.
In PHPR 5, those blocks are grayed out. Now we did make a structural change to the program and developed a new database schema. In phpr 4.2, the field type for total was varchar. In the new system it is a MySQL decmail field. It seems like in PHPR 5, that the reports does not like to allow sum/aver/min/max calculations unless the field type is INT in MySQL.