One share cost: $26.25. Sam wants to buy 100, which means that the total price of the shares is: 100*$26.25=$2625. There is also commission of 5% of the total amount: 5% of $2625, which is: (5/100)*$2625=0.05*$2625=$131.25 So, Sam's total cost will be: the total price of the shares + the commission $2625+$131.25=$2756.25
