[KMnO4]

Your costs would be much higher with Type 1: somewhere between 10-30mL (3-10x 3mL pens) is more typical.

This is actually addressed in the article though:

> The study used manufacturer prices for the analysis. The final, net prices paid for insulins are likely to be significantly lower than manufacturer prices in the U.S. because rebates and other discounts often drive down the price paid by individuals in the U.S.