On: The Secret to Start-Up Success: Save Customers Money

[brm]

For being so simple, that's a complicated sentence.

[Hexstream → brm]

What if I put it this way?

  (defun evaluate-profitability (you your-service customer)
    (if (> (value service customer)
	   (cost your-service customer)
	   (cost your-service you)))
    "PROFIT!")