Corrections and update below:

On Wed, 13 Jul 2011, Luke wrote:

> I am running LSMB 1.21 for this installation.
>
> I have an invoice with a line item as follows:
>
> Qty: 11
> Price: 12.90
> Disc: 25%
> Total: 106.48
>
> Now, that total is wrong.  It should be, assuming banker's rounding,
> 106.37.

I.E. rounding the discount of 3.225 up to 3.23 off of each 12.90 (9.67).

> However, it is consistent with the way LSMB usually does discount
> handling.

Which is to ignore decimal places which the price doesn't include.  So 25% 
of 12.90 is 3.22 off (9.68).

> It did the same thing with another line item.
>
> Okay, so I know why that is happening, and how to deal with it.
>
> Here's the weird bit.
>
> On the printed version of the invoice, it appears to be doing the correct
> precision three math, and is coming to the correct result.

No, actually.  It is doing the correct banker's rounding.  The correct 
precision three math, is to get to a final price of 106.425, and then 
round that to 106.43.  I can get the on screen invoice to do that by 
making the price 12.900.

However when I do so, the printed invoice still gives 106.37 for that line 
item, which is the problem in all this.

> The customer pre-paid based upon my review of the total on screen, which
> was 152.26.  The total on the page, however, is 152.05.
> I didn't look at the line item totals and manually calculate them, until
> after I hung up from taking the payment.
>
> Since the customer prepaid, the printed version of the invoice now shows a
> balance due, of -0.21.
>
> My question is: why is this happening differently on the two versions of
> the invoice?  The on screen version, while not the correct method of
> handling the math, is the way the program usually does it.  The printed
> version, while preferable to the customer, and the correct 3-precision
> handling, is abnormal.

Correct rounding, not correct precision.

> Can this be reproduced, or is it local to my installation?
>
> Luke

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