Answer:
Singular and plural
Explanation:
¿Cuanto cuesta? is when you ask for the price of a specific item.
Example :
how much does this pencil cost?
* Cuanto cuesta este lápiz?
¿Cuanto cuestan? It is when you ask for the price of more specific object
Example:
how much do these books cost?
*¿Cuanto cuestan estos libros?
I hope it helps
