Yeah, it sucks

Being poor is knowing exactly how much everything costs. Some of the things being poor is about:

Being poor is thinking $8 an hour is a really good deal.
Being poor is never buying anything someone else hasn't bought first.
Being poor is having to keep buying $800 cars because they're what you can afford, and then having the cars break down on you, because there's not an $800 car in America North America that's worth a damn.
Being poor is six dollars short on the utility bill and no way to close the gap.
Being poor is hoping the register lady will spot you the dime.
Being poor is people who have never been poor wondering why you choose to be so.
Being poor is knowing how hard it is to stop being poor.

I would add a couple of other things to the list:

Being poor is walking home from the grocery store with a backpack instead of paying $3 for a cab ride 'cause you need that money for more food.
Being poor is hating television because it's free, but it's depressing because no one on it seems to have the problems you do.
Being poor is knowing the kids will be disappointed with the gift you could afford.
Being poor means saying no to invitations because you don't want to ask how much it will cost.
Being poor is hoping the kids don't get sick enough to stay home from school.