POS - Custom pricing for farmers markets?

[RibbitCandles]

So I attend many farmers markets and change my pricing during these.  In the app there's a spot to "over ride" the price, but it won't let me raise the price, only discount it.

i.e. product is normally 13.99 but I sell it for $16 at the market and that includes tax also.

Any way around this?  Would love to have all my analytics in one place! 

Also, doing it without adding a "custom sale", I'd like it to track my inventory.

Thank you!