I had three of them:
1 spare that I traded with you because yours was cleaner and you wanted to scrap it.
1 Came that with sr #1
1 Came that with sr # 2
I sold sr #1 to some kid in Orlando
I sold sr #2 to Tommy
I gave my spare oil pan to my friend Damon. (The one I traded with you)
Math Joe, it isn't a difficult concept.

3+1=4
4-1=3
Everyone is happy!