Return Quantity

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#Here is exactly what happens step-by-step

1. First Action: You buy a quantity of 10. Your total available invoice/receipt balance is 10.
2. Second Action: You return a quantity of 5. Your remaining returnable balance drops to 5.
3. Third Action: You return another quantity of 5. Your remaining returnable balance drops to 0.
4. Fourth Action: You attempt to return an additional quantity of 5.

 Where the Problem Occurs

The system will throw an error on your third return attempt (the fourth action overall).
How can fix it .