Powered 'n' Storage Carts

I Might be a Little too Persnickety. But shouldn't the:
Powered Minecarts be $25.40
$25 Cart + $.40 Furnace

AND

Storage Minecarts be $25.80
$25 Cart + $.80 Chest

And to be Honest, Am i THAT persnickety? :?:

 

Alright, at Least I Tried