I just figured it out, and if I factor in the cost of my tow and the cost of getting my tire fixed into the family pack of pork loin chops I bought down in South Elsewhere, it comes out to about $80 per pork chop.
Now, the tire was insured, so in reality I just had to pay 40 bucks; and I get my towing fee refunded by my insurer; so that's good news.
The bad news is that the problem I'd originally scheduled a diagnostic for with my mechanic is going to cost me about $250. And I have been told that I need two new front tires sooner rather than later.
Maybe I'll have some wine with my pork chops. While I can.