The capacity planner seems wrong

http://docs.basho.com/riak/latest/references/appendices/Bitcask-Capacity-Planning/ seems to give results I don't expect. I'm attaching a screenshot. No matter what I put in the system memory textbox, the result tells me I need that amount of memory clusterwide, and tells me I need a ridiculous number of nodes.  This can't be right :)

![Untitled](https://f.cloud.github.com/assets/279875/119664/d4f2bb04-6caf-11e2-96f4-d306d1734fe1.png)