Ink Pricing

Dad: What did you do today?
Me: I made a bunch of prints for work.  I was going to do five but I ran out of pink  ink.
Dad: How much is a replacement?
Me: $12.97 for a 1/3 of a fluid oz or about $4500 a gallon.
Dad: What’s it made of?
Me: Well, four things, I think.  Pigment, and some sort of semi-aqueous fluid as a suspension medium.  The 3rd and 4th ingredients make up the lion’s share and are unicorn blood and profit margin.  I’m not sure what the ratio is though.