If food prices went up times 10, my family literally couldn't afford food from the store. I would stock up on these staples that help me preserve food:
Sugar,
Salt,
Glass jars and lids (lids can be reused, but they do get bent/scratched sometimes)
Spices I cant grow, like black pepper, that make a big difference in taste,
Butcher paper,
Oil and cooking fat.
I would get more scrappy, harvesting and using food thats inconvenient, like wormy fruit and milkweed I have to hike to.
I have a feeling my kids would be more open to eating fish and rabbit and squash and nettles!
I would grow more oil crops.
Other than this, my food systems already in place, along with all the preseeving tools and gadgets I've gathered, would cause me great peace of mind. I have no doubt we could do it.
The seed library I made, the herbalism classes, and all the community around me would figure out a way to take care of ourselves again. I have friends with stockpiles of freeze dried meals they protect with boobie traps. Thats not my jam. If its gets so bad that you've got food-or-pharmaceutical-deprived zombies in your city, leave and come be a part of my community. We are ready.