How long does food last in your house?

Curious how many people live in your home, how much $ per week is spent on food, how long does the food actually last in that week? It’s just my husband and I. I bought groceries yesterday morning, he ate pretty much a whole box of triscuits in a day. They were gone by lunch today. He’s trying to lose weight and we are trying to stick to a strict budget. What do I do?! 😫