You are analyzing historic unit costs for 18'' Class 5 reinforced concrete pipe is a...

The median cost is found by ordering the unit costs and selecting the middle value. The ordered costs are:

$26.78, $34.50, $37.30, $40.00, $46.59, $55.00, $55.00, $65.00, $75.00

Since there are nine data points, the fifth value in this list is the median:

C. $40.00is the median unit cost.