The answer is son because you have to conjugate.
Answer:
Mack y carmen juegan en el parke todo el dia
xochitl y marisa estan comiendo juntos en el comedor
tess le encanta estar con marissa
tim va en camino a la casa de andy para jugar
Marissa ayuda a luisito con su tarea
Explanation:
First ¿Cuánto Cuesta? means How much in Spanish to answer correctly to that answer you say a number for an example:
Girl : ¿Cuánto Cuesta?
Guy: Tres
you may saw the object you are talking about.
But if you wan to answer as saying in terms like how much you love someone you say todo esto which means this much.
You are not giving context of the question or further text
