That's a good deal.2 plum trees, 1 peach tree and 1 fuji apple. Less than $14 a tree, some were $11.
Color genetics in chickens is very complex. Most of the time it's not enough to know the color of an individual bird, but you need to know the parents as well. There are often more than 2 alleles involved to make a particular color, then you've got pattern to consider as well. There is a "calculator" http://kippenjungle.nl/Overzicht.htm but I haven't had the patience to go through it and see how it works.