It takes me one hour to drive from my house to BYU. This doesn't really matter, since I don't go there all that often, but sometimes I do.
If I were to use public transportation to get to BYU, it would take me two hours. But I'd be saving gas, and I could allegedly accomplish some work on the train and bus (I say allegedly because I more often end up staring out the window at the mountains and clouds instead).
So which, then, is more cost effective (environmental issues aside)?
Assume the price of gas is $3.75.
Assume my car gets 30 mpg.
Assume I live 45 miles from BYU.
A drive to BYU would cost me $5.625.
I have no idea how to figure out what a ride to BYU costs me, besides one hour (I have a bus pass).
Which would I rather have: $5.625 or one hour?