The mathematical journey from "2+2=4" to "calculating average price of office supplies" is the greatest tragedy in modern education. You spend years mastering calculus, differential equations, and complex integrals only to end up in a cubicle calculating how much the department spent on highlighter pens.
That Fundamental Theorem of Calculus you sweated over? Completely useless when determining if £6.07 is too much to pay on average for sticky notes and staplers. The real math problem no professor prepares you for: calculating how many years until retirement.