The article, talking about a patient's hospital visit, mentions "the $31 low-dose aspirin, of which they'd given him four."

i think in this case, if you're at all familiar with what US hospitals charge for the small stuff, it's a safe assumption that when someone says aspirin costs $30 a dose, they're not talking about buying it at a CVS. of many folks on hacker news dot com i trust you to bridge that gap instead of nitpicking!

I'm capable of understanding context.