Since everybody needs food to survive, why doesn't it cost more than an iPhone?

If you don't eat food, you would die. Nobody would die if they don't have an iPhone. So, shouldn't the price of food be higher than an iPhone?

Added (1). and most people don't know how to grow their own food which increases their perceived value

Added (2). This is strictly economic question, not a morality question

How do I get rid of photos labeled My Computer on my iPhone?

I've been trying to clear up some space on my iPhone, and recently I noticed that I have a few albums labeled from My Computer.

I've tried going through iTunes, but my phone doesn't seem to sync up to it, and there's nothing in the setting that will let me get rid of them. I can't even find the actual pictures on my computer, so I have no idea what to do. It's gotten to the point where these pictures are annoying me. I think they were once used as backgrounds, but I can't find the folders or anything.

What am i doing? Connecting Iphone 4 to home stero system?

I've recently acquired a pair of old speakers off ebay. I've hooked them up to a Cambrdge A100 Amplifier.

I've connected the Iphone 4 to the amplifier through a Digitial to Analogue Audio converter through an Aux to Coaxal cable.

This then connects to the amplifier through standard RCA cables.

I unfortunately don't get any sound coming through the speakers, other than a bit of feedback and crackling when the volume nob is twisted.

The speakers work fine when connected to an AA battery for testing, the amplifier i'm sure works, as does the iphone.

What am i doing wrong? I'm completely new to this set up so any advice would be good!

Cheers

Added (1). EDIT: So the DAC has gone but still nothing coming through… What's the best way to test the system?