1. **State the problem:** Calculate the sum of 60000, 4500, and 9.
2. **Formula used:** Addition of integers is straightforward: $$a + b + c$$ where $a=60000$, $b=4500$, and $c=9$.
3. **Perform the addition step-by-step:**
$$60000 + 4500 = 64500$$
4. **Add the last number:**
$$64500 + 9 = 64509$$
5. **Final answer:** The sum of 60000, 4500, and 9 is **64509**.
Integer Addition 0943Ef
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