I thought the usual amount was around $900 USD. And you have to report any income you have received, even if it is an extra $20.
I know of one guy who was on disability, and he played a lottery ticket. He won $500. His monthly payment was $700. At first he thought alright, he had extra money he was going to get caught up on some things. Well being the honest person he was he reported this extra income not thinking it was not enough to affect his income. He received a letter in the mail two weeks later stating that there was an over payment and that he would be receiving only $200 the following month and his case would be under review until further notice. The next month his property taxes were due, he had to pay $180. Out of all that 'extra money' he got to keep only $20. He said he had the pleasure of winning some money from the state lottery and also had the pleasure of having to give it right back. He's not played any lottery tickets since as he's learned his lesson.