Annual Flotation Cost Tax Effects:
Annual tax savings on new flotation = 56,818.18$
Tax savings lost on old flotation = 37,500.00$
Total amortization tax effects = 19,318.18$
Annual interest savings due to refunding:
Annual after tax interest on old bond = 5,250,000.00$
Annual after tax interest on new bond = 4,200,000.00$
Net after tax interest savings = 1,050,000.00$