When I prepare my monthly food budget I use some average numbers.
The average cost of restaurant meals are: breakfast $5, lunch $6 and supper or dinner $8.
With 30 meals of each meal each month the total cost is: 150 + 180 + 240 = $570 for the month.
When I prepare my meals from groceries my average cost is $3 or with 90 meals = $270 for the month.
When I use coupons and the flyer specials I usually reduce my cost by about $100 each month.
The flyer specials and coupons reduces my cost of food to $150 to $175 each month.
For additional topics:
How to Shop for Food
How to use Coupons for Food in Canada
How to use Flyers for Groceries in Canada
Go to: http://www.eslincanada.ca/food.html