Use the Following to Answer Questions

Use the following to answer questions :
Scenario: The Aggregate Production Function
Holding the human capital per worker and technology unchanged, the estimated aggregate production function in Jamaica is Y / L = 50 × K / L, where Y = real output, L = number of workers, and K = quantity of physical capital.
-(Scenario: The Aggregate Production Function) Look at the scenario The Aggregate Production Function. If K / L = $81, then real GDP per worker is:

A) $4,050.
B) $4,000.
C) $4,096.
D) $40,500.