[latkin]

Interesting challenge, and very impressive.

But he isn't honestly accounting for the cost of the salmon, even by his own rules ("Food that I don't use needs to be factored into my costs.", "if it goes to waste, I have to charge myself for it.").

The salmon, at $1.99/lb, costs $4.48 for 2.25lbs (36oz) of whole fish. From that, he's only able to extract 3x 6.25oz portions (19oz total) of meat.

Despite consuming everything he could/would from $4.48 worth of fish, he only charges himself $0.77 * 3 = $2.31, ignoring the cost of the waste that he was required to purchase in order to obtain the meat.

IMO a fairer accounting for 3 equal servings would be $4.48/3 = $1.49 per serving. Nearly double.