We have a variety of bond offerings at different maturities; a typical one is a recent offering of senior unsecured notes. These were issued in 2019 and reach maturation in 2029. However, they sold for $99.17 per $100 face value and carry a 3.9% annual coupon. The cost of capital for the unsecured note was 4.00% and the note was sold for $99.17

What does this tell us if this is a large source of long term capital for a business? (do not reference WACC - has not been taught yet)