Jill Bower purchased 175 shares of stock for $20 a share and sold it for $30 a share. The commissions required to buy and sell her stock totaled $50 for each transaction. Assuming she received no dividends during the time she owned the stock, what is her total investment on the purchase of this stock?

A) $5,200

B) $3,250

C) $5,300

D) $3,550

E) $5,500