Pls help 8th grade math , last two question pls answer both .

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

Find the commission on a $590.00 sale if the commission is 15%.

If t8 = 4 and t12 = −2, find the first three terms of the arithmetic sequence.