Grocery prices - what you need to know to stay on budget !

Do you ever do your groceries based on what you want to eat ? I think most people do, but those impulse buys at the grocery stores might cost you if you're not careful and you stock up on "sales".  When we do our groceries we always have a reference price in our head to makes sure that we're in fact are buying something on "sale".  It doesn't happen very often, but some groceries might mark up their price and then slash it go make it seem like you are getting a big discount.

So how do you know or get a reference price to compare ?  I went to Google and found this list from Statistics Canada

Unit	2015 Price	Price in Lbs
Round steak	1 kg	18.41	8.35
Sirloin steak	1 kg	21.28	9.65
Prime rib roast	1 kg	28.16	12.77
Blade roast	1 kg	15.94	7.23
Stewing beef	1 kg	15.82	7.18
Ground beef, regular	1 kg	12.29	5.57
Pork chops	1 kg	12.93	5.86
Chicken	1 kg	7.41	3.36
Bacon	500 g	6.84
Wieners	450 g	4.37
Canned sockeye salmon	213 g	4.71
Homogenized milk	1 l	2.49
Partly skimmed milk	1 l	2.34
Butter	454 g	4.61
Processed cheese food slices	250 g	2.88
Evaporated milk	385 ml	1.81
Eggs	1 dz	3.28
Bread	675 g	2.83
Soda crackers	450 g	2.73
Macaroni	500 g	1.52
Flour	2.5 kg	5.1	2.31
Corn flakes	675 g	4.91
Apples	1 kg	3.73	1.69
Bananas	1 kg	1.67	0.76
Grapefruits	1 kg	2.73	1.24
Oranges	1 kg	3.26
Apple juice, canned	1.36 l	2.1
Orange juice, tetra-brick	1 l	4.19
Carrots	1 kg	1.88	0.85
Celery	1 kg	2.77	1.26
Mushrooms	1 kg	8.38	3.80
Onions	1 kg	1.77	0.80
Potatoes	4.54 kg	5.55	2.52
French fried potatoes, frozen	1 kg	2.72	1.23
Baked beans, canned	398 ml	1.34
Tomatoes, canned	796 ml	1.67
Tomato juice, canned	1.36 l	2.37
Ketchup	1 l	3.47
Sugar, white	2 kg	2.81	1.27
Coffee, roasted	300 g	6.41
Coffee, instant	200 g	6.74
Tea (bags)	72	4.46
Cooking or salad oil	1 l	4.12
Soup, canned	284 ml	1.02
Baby food	128 ml	0.94
Peanut butter	500 g	3.57
Fruit flavoured crystals	2.25 l	1.74
Soft drinks, cola type	2 l	1.99
Soft drinks, lemon-lime type	2 l	1.9
Paper towels (rolls)	2	2.59
Facial tissue	200	2.6
Bathroom tissue (rolls)	4	2.6
Shampoo	300 ml	3.88
Deodorant	60 g	4.4
Toothpaste	100 ml	2.45
Cigarettes	200	95.42

I hope you find this list helpful ! What other methods help you stay on budget?