Don't bother. It's not worth it and it doesnt matter. More relevant than that post regarding pricing is my repeated canned response to that type of approach by a dj. As follows:
Simple point/fact #1: If you find yourself "having" to go that route to itemize/justify your price in that manner, then it's already TOO late as the 'Yes'/'No' switch has already been thrown by client.
When you're in that type of situation with a client, all you can do is to 'let it go' and take it as a lesson for next time, because the core problem is this: The value perception for the client simply isn't there prior-to that point.
What does this mean? It means one of two things. First - maybe that value isn't there to be had. (not an accusation or saying its the case here at all) But the fact cremains that some providers simply charge "wedding dj prices" to do a wedding when their offering simply isn't up to par. Second possibility - it means that you were unable, up to the point of that questions, to establish and reinforce a solid value statement. When this has happened, everything needs to be reconsidered - from the ad they saw you in, to the customer service involved, to the website presentation, marketing material/lit - you name it.
If value of services is properly established in the mind of the client, and the price is in-line with your offering (as determined by tangibles on your side... not in the client's mind), then that value statement will be there and the question will never c ome up.
Simple point/fact #2: As these kinds of price justification expositions arise when it's already too late to be of assistance in the sales process as the client's mind is made up, the only use this "itemization tactic" serves is as an "Ego Booster" or "Wound Licking" for the spurned DJ involved. I guess some guys need that?
Simple point/fact #3: This kind of client "Edge-oo-muh-ka-shun," if it is to be used at all, can ONLY be properly used and be of value in ESTABLISHING value in the mind of a customer - trying to use it to sway their decision as "damage control" because that value perception was never established in the first place is a waste of time, and only serves to make you look desperate in the eyes of the client.
Simple point/fact #4: If you need to "analogize" or use "non-dj-related" approaches towards justifying your pricing to clients, chances are, as said before, it is highly probable you're offering isn't worth what you're charging for it, or you need to try to modify everything in your arsenal to instill that value judgment from day-1.
Bottom line: You should never have to rely on or point to anything other than your own services and offering in a vacuum to justify your pricing. If you need to, something else is fundamentally wrong.