REVISION NEEDED FOR MATH ERROR IN EXAMPLE 1:

In Worked Example 1, the final claim about the 15-year borrower investing the full $3,484 payment for 15 years at 8.0% is not mathematically justified in the article. The $286,447 figure is not explained or derivable from the stated assumptions. Recommend either:

1. Remove this claim and simplify the conclusion to state only the $273,960 net advantage, OR
2. Recalculate and show work: $3,484/month for 180 months at 8% compounded monthly equals approximately $1,213,317 accumulated value (this number IS mentioned later in Worked Example 2). But the $286,447 intermediate figure should be removed as it's unsourced and confusing.

Also fix Key Takeaway: change '558,036' to '557,960' to match the narrative calculation.

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