Only one, but it takes nine years.
None. They just sit in the dark and cry.
one, but it takes 32 lightbulbs.
They were unaware the lightbulb was an issue & regret unknowingly paying to change it
Depends on the supply and demand curve
Paddy O'Furniture
Patty O'Furniture
A: Only one but it may take him/her more than five years to do it.