Joe owes his sister lisa $12 and his sister kelly $18 his brother david owes joe $20. joe writes the number -12 to represent the amount he owes lisa what number represent the other amounts given above? which person owes the most money?

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?