One of the most specific instances of those costs occurred about 15 years ago when one of our space probes malfunctioned and was lost because, as was later determined, one of engineers on the project failed to change a calculation from inches into centimeters.
But in general, since all of our trading partners use the metric system, making this change cannot fail to increase our success in world trade, and economic strength and political strength go hand in hand.
So as we have seen, from virtually every aspect the metric system makes sense, and we should embrace the challenge and begin to phase it into our daily lives, and thereby allow us to join the other countries in the world in this important area.