1. **State the problem:** Trevor sold her condo for 513120, which is 110% of the original price. We need to find the original price. 2. **Formula:** If the selling price is 110% of the original price, then $$\text{Selling Price} = 1.10 \times \text{Original Price}$$ 3. **Set up the equation:** $$513120 = 1.10 \times \text{Original Price}$$ 4. **Solve for Original Price:** $$\text{Original Price} = \frac{513120}{1.10}$$ 5. **Simplify the fraction:** $$\text{Original Price} = \frac{\cancel{513120}}{\cancel{1.10}}$$ 6. **Calculate:** $$\text{Original Price} = 466472.73$$ 7. **Answer:** The original amount Trevor paid for the condo was **466472.73** rounded to the nearest cent.