I had a play around on it for a bit of fun. Based of today's data i got from CMC (I know its not that accurate...)
Total Daily Transactions: $0.001 trillion ($1 billion)
Store of Value: I assumed 75% of XRP is being unused at the moment. $0.015 Trillion ($15 billion).
Duration: 0 years (today's volume)
Circulating Supply of 42.5 billion XRP
The calculator showed $0.47 - which is about the price as of writing ($0.46)
All just a bit of fun really, but interesting that the calculator was so close....