Bill Campbell invested $3,600 and borrowed $3,600 to purchase shares in Kellogg. At the time of his investment, Kellogg stock was selling for $53 a share. (a) If Bill paid a $53 commission, how many shares could he buy if he used his $3,600 and borrowed $3,600 on margin to buy Kellogg stock? (Round your answer to 2 decimal places.) (b) lgnoring buying commission, Assuming Bill did use margin, poid a $51 total commission to sell his Kellogg stock, and sold his stock for $56 a share, how much profit did he make on his Kellogg investment? (Round your answer to 2 decimal places.)