unemployment question

[power6usa]

I just recieved two letters from michigan unemployment. I was layed of back in dec and was called back in march. During the time i was unemployed our house was foreclosed on and we were forced to move 200 miles away from my job. When i was called back i went to tell him i could not work anymore and ended up working a day for him in which he paid me $100 cash. I have a few questions how much trouble am i in for not reporting that money. Does working 1 day affect the unemployment after that. I was told that living that far away is reason for not going back to work. is this correct. is working 1 day like starting a new claim. Any help is much apreated thanks