please help!!!!!!!!?

hi everyone who reads this, today something happened to me that i know i cant blame on any one and that is i backed out and i hit a tree(the tree was fine if u cared to know). first i though oh i hit a bump but when i went to look i had smashed my brake light cover. i don't know i have to take it to a shop to get it checked out but i want to know how much would the cover coast, i have a kia so I'm hoping it will be cheap.are this covers cheap or not the car is a kia spectra and its a 2001

i know it sounds funny i wasn't thinking when i put it on R

please don't laught to much