Like I said, one can fiddle with the numbers to swing the accounting a fair bit in one direction or the other. As you've demonstrated, if one makes optimistic assumptions about the age of the donor and maximizes the number of recipients by assuming a strict one-organ-per recipient (include just one lung at a time, and no multiple-organ transplants--bear in mind that the vast majority of pancreas transplants are actually pancreas-kidney, for example) and 100% organ recovery and transplantation, one can choose to make the math give you the result you're looking for.
It's very sticky if you want to score tissues that aren't necessarily lifesaving or for which artificial or animal alternative sources exist. (It's ethically problematic to suggest, for example, that more dead motorcyclists are a good thing because it will improve the supply of cadaveric ACL replacements, especially given that many patients could instead receive an autograft of their own tissue.)
It doesn't help that you're neglecting the last and most important part of my comment acknowledging that a very substantial fraction of potential organs won't be converted into actual transplants: helmetless motorcyclists who die too far from care or too quickly for their organs to be recovered; ones who have communicable diseases, malignancies, or other medical conditions that exclude them from donation; and so forth. (Going forward, helmet laws will only be suspended if you're over 40, free of hepatitis and HIV infection, have recently been screened for cancer, and are biking in an area with excellent ambulance service within 1 hour of a major transplant center. Hmmm...) Each dead motorcyclist is only "worth" 60 years multiplied by the fraction of viable organ recoveries--which probably comes out to well under 50%.
Finally, we're using "accounting" in a couple of different ways, here. I was using it purely to refer to life-years saved or lost. If we actually want to look at dollars and cents, it gets really ugly really fast. In the United States, the total billable costs for a heart transplant (including 30 days of pre-operative screening and prep, organ procurement, the transplant operation itself, and the subsequent 6-month period of recovery and rehab) comes out to about a million bucks. A single lung or a liver transplant are both well over half a million apiece. Kidneys are well clear of the quarter million mark.
From a purely financial perspective, it's waaaaay less costly to just let the motorcyclist survive and the potential transplant recipients die in a few months or a year, rather than let them be brutally expensive surgeries with steep and ongoing maintenance costs. Amortizing that heart transplant over the likely life of the recipient (or the transplanted organ) runs a hundred grand plus per year. Oh, and don't forget the cost of care and rehab for all those brain-damaged motorcyclists who don't manage to actually die from their head injuries....