Running Totals

[tkaplan]

What is the general rule in reports - when do you set the running totals property to "over group" or "over all" or when do you use the sum() function?

I am so confused and i can never figure out which one to use so if someone can explain it I would be forever greatful.

Thank you.

 

[tkaplan]

comparing the two methods:
using the example you provided of phone expenses, what would be the difference in :

running totals report:
department
detail: employee_name , amount_used
department footer: text box of amount_used with settings set to running total over group
report footer: text box of amount_used with settings set to running total over all

versus
sum report:
department
detail: employee_name , amount_used
department footer: text box named dep_total: sum(amount_used)
report footer: text box of sum(dep_total)

Thank you