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 . $40.00 is the median unit cost.

Given Scenario:
The question involves selecting the correct formula for present worth calculations.
The present worth (or present value) formula is typically represented by: PV=FV(1+i)nPV = \frac{FV}{(1 + i)^n}PV=(1+i)nFV​ which is equivalent to Option D.

The Cost Performance Index (CPI) is calculated using the formula:
CPI = BAC / EAC
Given:
Budget at Completion (BAC) = $50,000
Estimate at Completion (EAC) = $57,500
CPI = $50,000 / $57,500 = 0.8696
Since CPI < 1, it indicates that the project is over budget. The correct answer is A. <1.

Float, also known as "slack," refers to the amount of time that a project task can be delayed without causing a delay to subsequent tasks or the overall project completion. The types of float include:
Total Float: The amount of time a task can be delayed without delaying the project's completion date.
Negative Float: Occurs when the project is behind schedule, meaning tasks must be accelerated to meet deadlines.
Free Float: The amount of time a task can be delayed without delaying the early start of any subsequent tasks.
Open end is not recognized as a type of float. Therefore, it is the correct answer as it does not belong to this list.

The Schedule Performance Index (SPI) is a key metric in Earned Value Management that measures how efficiently time is being used on a project.
Key Points:
SPI Calculation:
SPI = BCWP / BCWS
BCWP (Budgeted Cost of Work Performed) = $105,000
BCWS (Budgeted Cost of Work Scheduled) = $100,000
SPI = 105,000 / 100,000 = 1.05
Interpreting SPI:
An SPI greater than 1 indicates the project is ahead of schedule.
Conclusion: The correct answer is C. BCWP/BCWS = 105,000/100,000 = 1.05 because this accurately reflects the schedule performance index for the project.