How i the answer in double digit multiplication

Adriana sold 50 shares of a company’s stock through a broker. the price per share on that day was $22.98. the broker charged her a 0.75% commission. what was adriana’s real return after deducting the broker’s commission? a. $8.62 b. $229.80 c. $1,140.38 d. $1,149.00

Math i have no idea how to do a and b

Find │–14│ a. 14 b. –14 c. start fraction 1 over 14 end fraction