Solution:
The cost of debt capital (Kd) = I+(nRV−NP)÷(2RV+NP) 
Where: I = Interest on Debenture = 8% x 100 = 8
           NP = Net Proceeds = (105% x 100) – (2% of 105% x 100) = 105 – 2.1 = 102.9
           RV = Redemption Value = 100
             n = Period of Debenture = 10 years
Kd = 8+(10100−102.9)÷(2100+102.9) 
Kd = 101.458−0.29=101.457.71=0.076or7.6% 
The cost of debt capital (Kd) = 7.6% 
 
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