Bill Campbell invested $3,400 and borrowed $3,400 to purchase shares in Kellogg. At the time of his investment, Kellogg stock was selling for $52 a share. (a) If Bill paid a $55 commission, how many shares could he buy if he used his $3,400 and borrowed $3,400 on margin to buy Kellogg stock? (Round your answer to 2 decimal places.) Number of shares (b) Assuming Bill did use margin, paid a $91 total commission to sell his Kellogg stock, and sold his stock for $59 a share, how much profit did he make on his Kellogg investment? (Use the number of shares computed in part (a) rounded to 2 decimal places. Round your final answer to 2 decimal places.) Total profit after commissions