I can't seem to find an answer to this question, but let's say I want to do the following (assume a start time of 10:00 a.m.): 1) Start up a droplet based on a snapshot. 2) Run the droplet for a couple of minutes. 3) Destroy the droplet. 4) Five minutes later repeat steps 1-3. 5) Fifteen minutes later repeat steps 1-3. 6) Two hours later repeat steps 1-3. What will be charged? $0.014 or $0.021?