100 students were surveyed. of those surveyed, 60% said they had a sister. of that group, 30% also had a brother. of the students who did not have a sister, 50% had a brother.

Jody bought 20 shares of amazon at the close price of $121.00. she bought 20 more shares a year later at the price of $127.00. two years later, she sold all of her shares at the price of $133.00. her broker charges $50 for each transaction. after all of these transactions, how much money did jody make?