Here is a program written to simulate the Symbol price checking station pictured below.
I have seen them used at K-Mart and Target, and I've spotted another model in a Big W store.
I took these pictures at K-Mart myself, in succession while scanning a camping can opener
twin pack that I was about to purchase. These units must retrieve product information from either
a network or storage device, because it takes a few seconds for the price to be displayed.

My PSP price checking application is actually part of a larger program that was written
for stocktaking and other purposes, but this module was intended as a seperate function.
My PSP application also speaks the price in a high quality Human voice using a speech routine
written for the abovementioned application.
In a later version than pictured here, I implemented auto text centering, so the display is neater.

This program is how I first tested the use of a graphic font of this type.
Previously, all of my PSP programs with graphic text used png fonts which are actually made
out of small pictures of letters, symbols, or numbers that get drawn to the screen to form words.

This program is never intended for release to the public.
It is featured here as a demonstration to prospective employers, and to show friends or internet buddies
that the job of very expensive hardware and software can sometimes be done better and cheaper using
alternative methods.

The program is operated by scanning items with any serial barcode scanner which are cheap these days,
and can be safely connected to the PSP unit via a resistor to the recieve pin of the headphone remote control socket.

In the above picture you can see a high quality screenshot taken with a camera in the dark.

Finally, the YouTube video link below shows the unit in action.
You can clearly hear the voice reading prices in the video.
You can also see the laser from the barcode scanner, as it scans any of three barcodes.
The example product "Colemans Can Opener $2.29" has been included in the stock file,
as well as Tally Ho tobacco papers. The third barcode is a rogue product that has not been
ranged in to the stock file. This is an undesired, but familiar occurance in many retail operations.