### Symptom

You have posted a customer invoice but the Maximum Cash Discount is showing the calculation as expected.

### Environment

SAP Business Bydesign

### Reproducing the Issue

- Go to the Receivables work center.
- Select the Customer Accounts view.
- Search and find Customer ABC and click on view. (ABC represents the Customer Account code).
- In the Customer Account Monitor select the customer invoice 123. (123 represents the Customer Invoice ID).
- At the bottom of the screen you can see Payment Terms / Due Dates tab.
- Maximum Cash Discount is updated with unexpected value or the discount amount picked during the payment of the invoice is showing unexpected value.

### Cause

In the customer account monitor when you select this customer invoice the values & amounts may look something like this (please note the following values are just example numbers):

- Maximum Cash Discount: -18.000,01
- Normal Cash Discount: -6.000,01
- Total Invoice value: 660000
- Cash Discount Percentage: 3%

To calculate the Maximum Cash Discount the system must first calculate a proportional value.

The Proportional value is calculated by:

Total Item Net Value/ Total Invoice value = proportional value

The system calculates a proportion as follows: 600000/660000 = 0.9090909090909

-> This data type can hold only 6 decimal places. So the 6th decimal place needs to be rounded up/down. => 0.909091

### Resolution

System is calculating Maximum Cash Discount as expected.

Example: 600000/660000 = 0.909091

Maximum Cash Discount Amount calculation = -1 * proportion * Transaction Amount * Maximum Cash Discount Percentage / 100.

Calculation using this example: -1 * 0.909091 * 660000 * 3 / 100

Maximum Cash Discount: 18,000.01

### Keywords

Maximum Cash Discount calculation, normal cash discount calculation taking extra decimals , KBA , AP-PAY-ADV , Payment Advice , Problem