he buys them for you

Does the landlord pay for lightbulbs? - Yes, he buys them for you.
¿El dueño paga las bombillas? - Sí, se las compra.
Regarding the cake ingredients, he buys them for you and you pay him back.
En cuanto a los ingredientes para la torta, se los compra y usted lo paga.
You don't have to worry about finding tickets. He buys them for you as part of the package you chose.
No tienes que preocuparte por encontrar boletos. Te los compra como parte del plan que elegiste.
Palabra del día
el dormilón