Report summing problem

[LAS]

Is there a simple way to do this? I think I can get it done with coding and
such, but perhaps there's an easier way?

I have a report that is grouped as follows:

Class
Student
Item Type
Item

I would like to display the subtotals of a numeric field for the different
Item types and Items for each student and each class. Is there a simple
way?

TIA
LAS