We have 50 boxes to ship. Their cost is $20 each, and our inventory holding cost is 36.5% per year. There are 4 ways to ship: Method A costs $100 and takes 2 days, Method B costs $90 and takes 8 days, Method C costs $80 and takes 12 days, and Method D costs $70 and takes 25 days. How should we ship? Method A Method B Method C Method D