Sen Corp., a publicly-traded, mid-cap company, wanted to obtain $30 million in new capital to expand its Iowa plant. Cost of capital was a factor in making the decision. Sen Corp. could either issue new preferred stock or new debentures. Sen Corp.'s underwriter estimated that preferred stock should have an annual dividend payout of $6 and an issue price of $103 per share. The debentures should have a coupon interest rate of 9% and an issue price of $101. Sen Corp.'s marginal income tax rate was 40%. Which of the following approaches describes Sen Corp.'s best strategy?