Cost to Fix side view mirror?

So i drive a 2008 honda accord coupe, and a few days ago i hit my drivers side mirror, and the plastic covering popped off, and the outside of the mirror has a crack on it. The mirror still works fine, and I was able to put the part that popped off back on. So now there is just a crack in the lining part of the... show more So i drive a 2008 honda accord coupe, and a few days ago i hit my drivers side mirror, and the plastic covering popped off, and the outside of the mirror has a crack on it. The mirror still works fine, and I was able to put the part that popped off back on. So now there is just a crack in the lining part of the mirror, and some slight scratches. Should i get it fixed, or just leave it? and if I do, how much do you think it would cost to repair it? thanks ahead of time!
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