John Works 40 Hours in a Week, at $15

Multiple Choice

John works 40 hours in a week, at $15.00 per hour, and produces 150 widgets. Amy works 32 hours in a week, at $18.50 per hour, and produces 128 widgets. Dave works 36 hours in a week, at $17.75 per hour, and produces 141 widgets. Which employee is the most cost effective for the company in terms of widgets produced per dollar of payroll spent?

A) John
B) Amy
C) Dave
D) Dave and Amy are equally effective