E9A06 - Amateur Extra Class

E9A06 : What is the effective radiated power (ERP) of a repeater station with 200 watts transmitter power output, 4 dB feed line loss, 3.2 dB duplexer loss, 0.8 dB circulator loss, and 10 dBd antenna gain?
A 317 watts
B 2,000 watts
C 126 watts
D 300 watts
Correct Answer: 317 watts