Regular montrer chariot, panier Theory

Mr. Maellard says "Those carts aren't cheap." and makes Benson buy a new chariot, panier in the "Busted Cart" episode. But whenever a chariot, panier blew up and ou 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 montrer that at least he is aware of the multiple carts. In the episode where Benson gets super angry, he actually destroys a chariot, panier himself,but a divisé, split seconde later, Pops and Skips are seen driving a chariot, panier 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 donné time? Even so, why does Benson want to "replace" "THE CART" with a new, plus 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 plus carts.

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

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