C sold 300 shares of IBM stock for $5,200. She had paid $3,000 for the stock. Commissions of $300 on the sale and $180 on the purchase were paid. How much are Cs amount realized and her gain realized, respectively, on this sale? a. $2,200 and $1,720 b. $4,720 and $1,720 c. $4,900 and $1,720 d. $5,200 and $2,200