The fibonacci sequence is f(n) = f(n-1) + f(n - 2).
if f(7) = 13 and f(8) = 21, which of the following is true?

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?