HOW much for a reverse camera installed??????? PLS HELP ME!

[Bring-da-Ruckus]

So I want to install a colour reverse camera etc in my xr6 dec/09 ford. How much and is it compatible with the screen already fitted or do i need a colour screen? How much to buy camera and (possibly new screen) and fitted. Here is a pic of the car. Cheers

[Lumps of cheese]

Dunno about the fords but i bought a kit for my calais for $250 including camera and did the install myself.