Brandon purchased shares of ABC stock as follows: 50 shares for $1,550 in 2016. 100 shares for $2,500 in 2018. 125 shares for $3,500 in 2020. In 2022, he sold 150 shares at $45 per share for gross proceeds of $6,750. If he uses the specific identification method to reduce or eliminate the amount of capital gain from this sale, what is the basis used to compute his capital gain or loss?

a. $3,900

b. $4,050

c. $4,350

d. $4,650