Swap all prices for bednets.
This extension replaces dollar values with the equivalent amount of bednets you could purchase using the same money.
In 2015, 438,000 people died of malaria. LLINs (Long-Lasting Insecticidal Nets) are currently the best way to fight the spread of the disease, and it costs $4.53 to purchase and distribute a net (the net alone is $2-3).
Bednets is intended as self-imposed subversive reminder that your money can put to many good uses, and it doesn't take much to help.