I guess it's time for this old joke, my apologies to those who have seen it before:
A guy's commercial freezer full of meat stops running. In a panic he calls a repair guy.
The repair guy shows up, overalls, cap, chewing on a grass blade, covered with dirt and grease and looking like he just walked off the farm. He looks at the freezer for a minute, unplugs it, pulls an access panel off the side, replaces a fuse, puts the panel back on, and plugs it back in and the freezer starts up.
he then hands the guy a bill for $202.00
The owner looks at the bill and goes ballistic. He yells at the repair guy
"Dammit you were only here for 5 minutes! And $202, what the hell is the $2 for?!?!"
The repair guys says:
"It's $2.00 for the fuse. It's $200.00 for knowing what fuse to replace!!"