I have a suggestion, but feel free to ignore it as the "$100 per week food challenge " is a catchy title.As there are different numbers of people in each household, why not use a guide of $5 per person per day? That works out at $35 per week per person.ie Single person : $35/week; Couples: $70/week: Family of 3: $105/week; Family of 4: $140/week; Family of 5: $175/week; Family of 6: $210/week Family of 7: $245/week etc