My name is Kitty. I have a very big and nice room and I have a great school things collection. My brother's room is near my room. He is Mike. And he has a big sports collection. I have twenty erasers, ten pencils, nine rulers and eight pens in my schoolbag. My brother has two baseballs, four soccer balls and five basketballs under his bed. How many erasers does Kitty have?
10 20 9 8