Calculators: A Real-world Example Using a Loan Estimate
https://match-stream-journal.novacrestiq.com/posts/ev-buying-guide-what-to-know-about-battery-health-before-you-buy
A practical guide should help you act, not add more confusion. Most students, households, and planners need a simple way to turn basic inputs into useful estimates. The clearest view comes from checking units, rounding, and fees