$25 per person All You Grocery Challenge

Today we started the challenge from All You to only spend 25 dollars per person per week.  This is more than I spend usually, so it shouldn't be too hard.  But, the date of the challenge started when we are on vacation, so this could be a bit tricky.  We only spent $5 today for a tip for our free breakfast at the hotel.  Later, we ate one more meal at our daughter's house so the total for the day was just $5.  I have some gift cards that I got for free, but am not sure if I can use them or not with the challenge.  I have several questions I need to get answered about the challenge.  Today was a great day and was very easy to stay in our budget.