You have purchased 200 units for $32.50 each. One unit consists of one ABC preferred share and one ABC common share. At the time of the unit issue, the market price of ABC preferred shares is $22.50 a share and ABC common shares is $10.50 a share. What is the approximate total cost base of the common shares?

a) $1,034.09

b) $2,068.18

c) $4,431.82

d) $0.00