Donating profits - how to handle returns

[kdash1228]

I am looking into donating all profits from sales made during a specific timeframe to a specific cause. But, I need to determine how to handle returns.

Would it be unethical of me to tell buyers that during this timeframe, I can only accept exchanges?

If I sell an item for $40 that cost me $20, then $20 is donated.
When the item is returned, I am theoretically -$40 until someone else buys the item.

Has anyone else donated their profits? How did you handle returns?

[SkybreakVerger19]

You need to be careful with the returns. It is already difficult to get it, you just need to sustain it. - Doug Battista

[Lilykevin86]

There's something else entirely to altruistic giving than accepting tax cuts. Charges toward the year's end when your assessment consultant assists with your government form.