In March 2016, NuVasive, a medical device company, raised $634 million of 2.25% convertible senior notes due 2021. The company's stock price was $45.15 at the time. The conversion rate is 16.7158 shares per $1000 bond. Calculate the conversion price in dollars and the premium as a percentage.
Please explain the answer including; reason for size and reason for convertible bonds instead of regular bonds.