A man has set up a Christmas display using 20 strands of lights (500 Watts/strand). If the man wants to wire the strand outlets to the house panel with a 30 amp breaker, Determine:
a) The number of 30 amp parallel circuits Cratchit will have to wire to the panel.
b) The energy cost for the display assuming $0.15 per kilowatt-hour, 5 hours per day for 30 days (in $).