Below is an instruction that describes a task. Write a response that appropriately completes the request in Spanish. Please answer in Spanish.

### Instruction:
 Allen ordered five boxes of pizza, which cost $7 each box. He then gave a tip which amounts to 1/7 of the total cost of his order. If he gave the delivery man $100, how much change did he receive?


### Response:
 El costo total de las cinco cajas de pizza es de $7 x 5 = $<<7*5=35>>35.
Le dio $35 x 1/7 = $<<35*1/7=5>>5 de propina al repartidor.
Gastó un total de $35 + $5 = $<<35+5=40>>40 en la pizza y la propina.
El cambio que recibió es de $100 - $40 = $<<100-40=60>>60.