The progression of passive-aggressiveness, Exhibit B

The most effective thing about this display is the actual ant on the counter. 

In the second expression of passive-aggressive money-collection, a simple Post-It must be bolstered by a few key elements to support the cause. 

1. Buy more things to increase the money owed.

2. Display math equations to make sure all roommates understand the derivative of their bills. 

3. Include receipt for purchases with confusingly circled and crossed-off items.

4. Reiterate urgency with strategic all-caps and underlines. 

If, when following this list, you begin to question the immediate need for 32 rolls of toilet paper when you clearly do not have the money to front the cost for the house, please ignore this red flag. 

Instead, possibly stifle that concern by buying 16 ounces of isopropyl. 

(Personally, I've never gone through an entire bottle of rubbing alcohol in my life. But I also don't buy a crate of toilet paper at a time either.)