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This is a combination of a rounding/decimal place issue and using different 
techniques to calculate the discount.
Assume a line discount rate of 15% and a line with quantity 3, unit price of 
£1.10 and gross line value of £3.30.
If you calculate the discount based on the line value and round down (as System 
21 does), you get a discount value of £0.49.
If you calculate the discount based on the unit price, round up (as a customer 
is likely to) and multiply the result by the quantity, you get a discount value 
of £0.51.
Perhaps another way of looking at the problem is the customer wants to 
calculate discount based on the invoice gross value, rather than by the 
individual lines.
This is demonstrated with an invoice on our system, for which the sum of the 
line discounts is £56.02, whereas the sum of the discounts calculated 
accurately (4dp) from the unit price is £56.06.
Just a thought but can discounts be calculated at invoice level within System 
21?



========================================
Message date : Jun 10 2004, 07:52 PM
>From : amyh@xxxxxxxxxxxxxxxx
To : "System 21 Users" 
Copy to : 
Subject : Re: [SYSTEM21] discount calculation





Gary,
I'm unclear what you mean by line price versus line value. The lines goods
value field is the unit price (with discounts applied, if any) times the
quantity.
You can have discounts based on line value, line quantity, or whole order.
Can you give an example of what is happening now vs what your customer
expects?

Amy Harris
The ROHO Group
amyh@xxxxxxxxxxxxxxxx
1-800-851-3449, ext. 2013
1-618-277-0514




Gary Shipp 
et> To 
Sent by: system21 
system21-bounces@ cc 
midrange.com 
Subject 
[SYSTEM21] discount calculation 
06/10/2004 04:37 
AM 


Please respond to 
System 21 Users 
e.com> 






Don't use the forum for a couple of months then need to post twice in one
morning!
We have a customer complaining because they are not receiving the discount
on sales invoices that they expect.
When I look at the data, I notice that the discount being allocated to each
line is based on the line value, wheras the discounts he seems to be
expecting the discount appear to be based on the original unit price. The
resultant rounding differences explain the missing pennies he's chasing.
Is there any way to structure the discount to be based on the line price
rather than value?
TIA

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