Dear Luis,
Thank you for your email about the upcoming shopping day with your parents. It sounds like a fun and productive way to spend the day. As for big shopping with my parents, we usually go once a week to buy groceries and other necessities. I do take part in promotions whenever possible, as it's a great way to save money and sometimes get extra benefits like the cool stickers you mentioned. Promotions help stores by attracting more customers, increasing sales, and building customer loyalty through special offers and incentives.
Looking forward to hearing about your shopping adventures!
Best regards, [Your Name]