A gallon costs 2 dollars so 3 cups would be... $0.42 cents.etc. etc. so the cake cost me 3 dollars and 73 cents.Your friends would look at you and never talk to you again!

They use it in hospitals and dog kennels, and nursing homes for odors.Also tired on cement using a hydrogen peroxide rinse.. for cat smells.. that was tricky, bought it at beauty salon in gallon jugs.. 

A running toilet can go through thousands of gallons of water in a short time.

Profit on gas can be a few cents a gallon if that.

Another project I had him do was replace my water heater and it cost ~$750 which included a new 40 gallon gas water heater, installation, new supply lines and haul away of the old unit.

With gas at 3.00/gallon, I don't fault some realtors for wanting to do this (aside from marketing, the act of transportation is the realtor's largest expense).

Every pipe inside the house (cpvc) had frozen and busted and run a million gallons of water through the finished basement.

But water is $6/1000 gallons... maybe $12 with sewer charges.  

If anything ever broke it would flood my house with thousands of gallons.

Hmmm...let's see...Two years I went to the gas station down the street and bought gas at about $4 per gallon.