Dak
mentat
It's not a myth at all.
Ex:
Orange soda (liter): $0.88 vs. Milk (half gallon): $3.80(+)
Whatever is cheaper to produce will be cheaper in the market, and anything that is hydrogenated or saturated with high fructose corn syrup is mainly the cheapest sort of food you will find here. Hell, it's cheaper to buy a can of diced peaches drenched in "light syrup" than it is to buy a normal damned peach.
I don't eat candy bars, so I'm not really sure what a Mars bar is. To take a wild guess though, I'm going to assume it costs $.99. Maybe $1.50 at most.
Fruit and vegetables can be stupidly expensive here too though. Surprisingly Fresh n Easy used to have cheap fruit, but they decided to raise the price because they could - now they are just as expensive as Ralph's* in most regards. They don't even halve the prices of their expiring foods anymore, which really sucks because I relied on that shit. The only thing worth buying there now is pasta (whole wheat package for $.99) and sauce (average $1.99-$2.50).
(* I use Ralph's as the standard price gauge point because they tend to cater their image and prices to the "middle class")
Shit food dirt cheap. Good food priced out of reach. Brought to you by Government Intervention.