Here is a spreadsheet for a 10 week ration for 1 person @ 2200Kcal per day for around £10 or $15 per week available from the local supermarkets for a basic food pantry. Most items will have a shelf life greater than 12 months. (Many of the items are available for less but quality has not really been diminished)



What is missing is of course are fresh fruit and vegetables, fresh meat and fish, fresh diary and eggs (I cannot easily find a source for dried egg in the UK). Spices and flavorings are also not included. This would increase the price per week considerably but it would be possible to survive on these basics for around 10 weeks for a total of around $150 per person.