How much do you think doctor's spend on their stethoscope when they live in a developing country? My guess: About 10 USD. Think about the global demand for st

How much do you think doctor's spend on their stethoscope when they live in a developing country? My guess: About 10 USD. Think about the global demand for stethoscopes for countries where GDP per capita is below 4000 USD. It must be enormous.