This one easy trick will save you $150! Just stay up an hour after bedtime ;) I got in the habit of doing this kind of calculation early in my career before re

This one easy trick will save you $150! Just stay up an hour after bedtime ;) I got in the habit of doing this kind of calculation early in my career before realising it is a) pointless unless someone will actually pay you that money if you instead do work, and b) still not a healthy way to think anyway in many cases where a) is true, due to life's necessities. It might be "cheaper" to pay a kid to mow the lawn but sometimes I find it relaxing.