How much did Bayer Heroin cost?

Inspired by a line of thought in the The practical aspects of making money with time travel thread…I was just wondering; How much did Heroin cost, when Bayer first sold it (legally), in the late 19th century?

I haven’t found a period price list for the various Heroin products, so far. To say nothing of how much the stuff would have cost per kilogram. (Even assuming you could have purified it, or bought it uncut from Bayer.)

So…anyone want to take this one on? (Please?)

According to the Consumer Unions Report on Licit and Illicit Drugs, “Hence, the nineteenth-century morphinist paying 2 1/2 cents a day for 2 or 3 grains of morphine (as in the example above) can be contrasted with today’s New York City heroin addict who would have to pay thirty dollars to sixty dollars a day for the equivalent— one or two grains (60 to 120 milligrams or six to twelve bags) of heroin 2 1/2 cents a day for 2 or 3 grains of morphine”