Regular toon kar, winkelwagen Theory

Mr. Maellard says "Those carts aren't cheap." and makes Benson buy a new kar, winkelwagen in the "Busted Cart" episode. But whenever a kar, winkelwagen blew up and of crashed no one else seemed to care, and they seem to have an ABUNDANCE of carts available. Everyone says "The cart" but Maellard says "carts" which seems to toon that at least he is aware of the multiple carts. In the episode where Benson gets super angry, he actually destroys a kar, winkelwagen himself,but a spleet, split seconde later, Pops and Skips are seen driving a kar, winkelwagen with two rows, which shows that there are multiple variants of carts as well.

So why did he have to get a new cart? Could it have only been because Maellard saw it himself? Possibly the characters refer to "the cart" as only one can be in use at any gegeven time? Even so, why does Benson want to "replace" "THE CART" with a new, meer futuristic one, implying that there was only ever one to begin with? Maybe he just bought ONE NEW CART, and possibly wanted to replace them all with the prototypes later on?

Also, in the zombies episode, Rigby says "Mordecai look! A cart!" using the generic form, indicating that somewhere there are meer carts.

And in the SAME EPISODE, beforehand, Benson says "The kar, winkelwagen needs a new suspension system."

So what do ya think, m8s? How many carts does the Regular toon Park really have?