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# Formula to calculate total

## Formula to calculate total

(OP)
Using crystal 7.  I have two fields:  Ordernum and orderamt
Problem is orderamt only caculates cumulative amounts:

Ex.:  Order 1  for $100 Order 1a for$100

Comes out as Ordernum        Orderamt
1              100
1a             200

I need a report that shows the actual amount of Order 1a. I've tried using a formula with Prev() which works great if I'm running a report based on Ordernum but if I need a report by date range (in the above example Order 1 is in June and Order 1a in August, I run the report only using Aug Orders)  then the Prev() isn't going to work for me.

Any suggestions?

### RE: Formula to calculate total

Is OrderAmt a database field, formula or running total?

Ken Hamady, On-site/Phone Crystal Reports Training/Consulting
Quick Reference Guide to using Crystal in VB

### RE: Formula to calculate total

(OP)
Orderamt is a database field

### RE: Formula to calculate total

So the table stores the cumulative amount, but not the increment?  That is an unusual scenario.

If you need to calculat the increment from the cumulative amount, without having the previous record, then I don't know of a way.
You will have to keep the records together.

Ken Hamady, On-site/Phone Crystal Reports Training/Consulting
Quick Reference Guide to using Crystal in VB

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