Play pricing information back in the summary

The pricing information did not previously show up on the summary page because it was stored in multiple pieces (e.g. `p8q1MinPrice`, `p8q1Unit`).

This commit keeps the same structure but extends it by storing a human-readable string of the price in `p8q1` which gets picked up by the summary page.

![screen shot 2014-10-21 at 08 49 23](https://cloud.githubusercontent.com/assets/355079/4714830/4db61ee8-58f7-11e4-89c3-689ed096e204.png)