And how do the FIeld_Plus and Field_minus compute their sums? (there's more than one way)
If they are calculation fields, you should be able to just use: Field_plus - Field_minus.
But I suspect that this answer is too simple. Perhaps these two fields are summary fields and you need to compute a difference of sub totals?
Sorry, didn't give enough info, my bad...
Field_Plus is a summary field, which adds up all the values of Field_MoneyIGet.
Field_Minus is a summary field which adds up all the values of Field_MoneyISpent.
So If Record 1 has 10€ in Field_MoneyIGet and Record 2 has 20€ in Field_MoneyIGet, my Field_Plus returns 30 €
On screen Field_Total = Field_Plus - Field_Minus works but If I print my report, where I have several in between results, It shows always the same value, which is also wrong.
Please, give us your wished result ( see .png )
I found a solution, for every record I added a total, where it puts the plus as positive number and minus as negative and then I sum up and i get the difference
Thank you guys