Why I was late for school

In the morning I had a normal day. I got up I  had breakfast I brush  my teeth then I walked to school with my sister .I saw 50$ on  the road I  went after the  50$ and I got the money and I  brought  my  school  lunch and with the rest of the money I gave it to my mum my mum put it in her bank. That is way I was late for school today.