Spend 100 and donate 2.5

You may be obsessed in buying shoes that you may have over 20 pairs, or cloths, or gadgets, etc, then you feel guilty that you spend so much money that may be useful for other necessary staff, I give you a solution to ease your guilt, for every 100 dollars or what ever your currency, donate 2.5 or 2.5% of the total amount you spent to charity, that will help you to be more aware of your financial and how to control it.