wuestion Help Cost of debt using the approximation formula For the following $1,000-par-value bond, assuming annual interest payment and a 28% tax rate, calculato the after-tax cost to maturity using the approximation formula. Discount (-) or Coupon Lite Underwriting fee premium (*) Interest rate 10 years $20 -$20 11% . The after-tax cost of financing using the approximation formula is % (Round to two decimal places.)