Using the square foot costs, how much would a 6,500 sq ft post office cost?

To find the cost of constructing a 6,500 sq ft post office using square foot costs, it's essential to understand that the cost per square foot needs to be multiplied by the total square footage. The choice labeled as $617,630 indicates an understanding of the appropriate cost per square foot for this type of building.

Assuming the square foot cost relevant for this type of construction is reliably derived or specified in previous contexts, when multiplied by 6,500 sq ft, it aligns perfectly with the total of $617,630. This calculation confirms that the chosen answer accurately reflects the method for estimating construction costs based on area.

The other options do not fit the calculations based on realistic square foot pricing for a post office. The discrepancy in those amounts suggests either excessively high or low building costs that would not typically apply to the construction of such a facility. The figure $617,630 represents a balanced and realistic estimate for the scope of a post office within that square footage.