I can prove my question as well:
Are you insane?
Are you out of your mind?
Are you crazy?
Are you a goof?
Do you live under a rock?
Bhai kaam ki baat karen, fazool baat ka faeda koi nahi. Not that I am illiterate and can't understand your math but the thing is funny, LOL of the year. Don't do this math practically in front of a showroom wala or he'll kick you out.
I mean,depreciation?! WTF were you thinking! This is PAKistan and the forums are PAKwheels.
Wake up from the beautiful world of wondrous dreams!