Lucia bought 800 share of a company's stock for $7.94/share. she pays a broker a commission of $16 to buy and sell stock. after one year, she sold all her shares, which were worth $8.75/share at that time. what was her rate of return?

a. 8.8%
b. 9.3%
c.9.7%
d.10.2%

A: How much did it cost to purchase the stock?
(# of shares x cost per share)
(add cost of commission)
800 x 7.94 = 6352
6352 + 16 = 6368

B: Find the net gain or loss.
(# of shares x selling price per share)
(commission - selling price)
(sale of shares - total cost)
800 x 8.75 = 7000
7000 - 16 =6984
6984 - 6368 = 616

C: Rate of Return (net gain/total cost)
616/6368
= 0.0967 = 9.7%

Where are the calculations?