Explanation:

Sure, let's break it down:

- Calculate 39.99% of 799.98:

- This is approximately 40% of 800.

- \( 40\% \times 800 = \frac{40}{100} \times 800 = 320 \).

- Calculate 59.98% of 499.98:

- This is approximately 60% of 500.

- \( 60\% \times 500 = \frac{60}{100} \times 500 = 300 \).

- Add the two results:

- \( 320 + 300 = 620 \).

- Find 24.89% of ? = 620:

- Approximation: 25% of ? = 620.

- Equation: \( ? \times \frac{25}{100} = 620 \).

- Solve for ?:

- \( ? = \frac{620 \times 100}{25} = 2480 \).

- Options Review:

- Option 1: 2260

- Option 2: 2640

- Option 3: 2480

- Option 4: 3260

- Option 5: 2880

The correct answer is Option 3, 2480.