What's the deal with industrialized food?

When we went to the supermarket, I used the economic and nutritional lenses to examine the food. To do that, I looked at the price tags and nutrition facts on the packaging of each item and came up with this:
Morton Williams Cheesecake, $11.95
2 liter Pepsi, $1.75
-100 cal
-0 fat
-25 mg sodium
-27 g sugar
-0 protein
Ocean spray, $4.75
-0 fat
-35 mg sodium
-50 mg potassium
-35 mg sugar
-0 protein
Chips ahoy chuncky, $4.19
-4.5 g fat
-0 cholesterol
-55 mg sodium
-less than 1 g protein
Steak, $349/lb, 0.96 lbs, $3.35
Ground beef $2.99/lb, 1.22 lbs, $3.65
Quarted legs $0.99/lb, 2.30 lb, $228
Bunch carrots (4-5 per bunch medium sized), $1.69
Loose carrots (single, larger carrots), $1.99

Possible questions:
-How much does it cost for me?
-How much did it cost for the store?
-How much did it cost to produce it?
-How is this going to affect my body?
-Will I regret eating this?