Final answer:
The range of the monthly sales goals is $26,000 (b).
Step-by-step explanation:
The range of values in the given options can be calculated by finding the difference between the highest and lowest values. Among the provided options, the highest value is $50,000 (d), and the lowest is $24,000 (a). By subtracting the lowest from the highest, the range equals $50,000 - $24,000 = $26,000. Rounding to the nearest thousand, the range becomes $26,000.
Therefore, the correct answer is $26,000 (b), representing the range of the monthly sales goals.