# Re: Billing coding problem

• From: Igor Neyman <igor.neyman@xxxxxxxxx>
• To: sbecker6925@xxxxxxxxx
• Date: Fri, 19 Aug 2011 11:24:36 -0400

```Let's call it "capacity".

amount_to_bill = flat_fee +
(CASE WHEN ((capacity > 10) AND (capacity <= 20))
THEN (capacity - 10)*rate1
WHEN (capacity > 20)  THEN 10*rate1
ELSE 0
END) +
(CASE WHEN ((capacity > 20) AND (capacity <= 50))
THEN (capacity - 20)*rate2
WHEN (capacity > 50)  THEN 30*rate2
ELSE 0
END) +
(CASE WHEN (capacity > 50)  THEN (capacity -
50)*rate3
ELSE 0
END) ;

HTH,
Igor Neyman

On Fri, Aug 19, 2011 at 11:07 AM, Sandra Becker <sbecker6925@xxxxxxxxx>wrote:

> Oracle - EE 10.2
>
> I have been asked to code an Apex application to replace our current poorly
> performing, inaccurate and woefully inadequate billing procedures, most of
> which is manual.  Very sad state of affairs for a software company, but
> there you have it.  The problem stems from the way we bill certain customers
> for archiving their data.  Billing is a tiered structure:
>
> First 10g - flat fee
> 11-20g    - rate 1
> 21-50g    - rate 2
> Over 50g - rate 3
>
> To further complicate, each rate level bills only for the gig that fall in
> that level.  Two examples:
>
>      customer has 15g; they would be billed     flat fee + (5g * rate1).
>
>      customer has 200g; they would be billed     flat fee + (10 * rate1) +
> (30 * rate2) + (150 * rate3)
>
> My math skills not being what they should be, I'm having difficulty coming
> up with the code to accurately calculate the billing amount.  Any help will
> be greatly appreciated.
>
> --
> Sandy
> Transzap, Inc.
>
```