Prime you spend $300 a month on just yourself?
What can I say, I like to eat well. Also, I buy a fair share of prepared meals. I like Annie's frozen meals plus specialty soups, prepared meals, salads and snack boxes made in store. I cooked more frequently in the past, but cooking for one can be a chore. My portions are reasonably sized. I frequently end up tossing the leftovers when I fix meals for myself.
Although have meals together on special occasions, my daughter and son-in-law eat differently than I do.....lots of takeout pizza. My grandson fixes his own meals and his girlfriend cooks meals on her own too. All of us being adults, get to eat what we like. There is a very large walk in pantry in the kitchen and a second refrigerator in the Garage. This gives each of us plenty of individual food storage.
My late wife was definitely a three meal a day person with a very restricted diet because of her chronic kidney disease, congestive heart failure and diabetes. When she was alive, I cooked meals which adhered to her diet for the two of us and drank protein shakes to fill the gap.
My mom and dad ate well without worrying about the cost. I learned extravagant grocery shopping from them.