My sister Donna started a trading card collection last year, but unfortunately, she can’t seem to keep track of her cards. Recently she took all of her cards with her on the bus to school. On the way...

My sister Donna started a trading card collection last year, but unfortunately, she can’t seem to keep track of her cards. Recently she took all of her cards with her on the bus to school. On the way there, some bullying sixth graders stole ¼ of her cards. Then she dropped six cards in the gutter when she got off the bus. She went to class and lost 2/3 of her remaining cards when she passed them around during show-and-tell. Then she gave three cards to her best friend. The teacher, Mr. Purcell, had a stash of trading cards which he let her pick through, giving her enough to increase her total by 1/5. When she went to recess, she found eight cards on the playground. Then at lunch, she accidentally threw half of her remaining cards away in her lunch bag. When she came home, she had only ten cards left. How many cards did Donna have when she left for school?