How do you do this and what is the answer

Any greatly appreciated! you in advance. 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's 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? a.$65.00b.$5288.00c.$210.00d.$310.00

Can someone pls ! pls answer all. no explanation needed..

In the polynomial below, what number should replace the question mark to produce a difference of squares? x2 + ? x - 36