Beth has just borrowed $$$$8$ comma $900$ on a$$ four$-$year loan at $8\%$ simple interest. Using the simple interest$$ method, her payments would be $$$$217\mathrm{.}28.$ What if Beth had made the same loan as an$$ add$-$on interest$$ loan? How would her payments$$ differ? Why is there a$$ difference?

Part $2$

With an$$ add$-$on interest$$ loan, Beth's payments would be $$$

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