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

### Instruction:
 Calvin buys a pack of chips, for $0.50, from the vending machine at lunch, 5 days a week. After 4 weeks, how much money has Calvin spent on chips?


### Response:
 Calvin achète des chips à $0.50 le paquet, 5 jours par semaine, pendant 4 semaines, donc il dépense $0.50 * 5 * 4 = $10.00 pour les chips en un mois.