C-Code For POS: Embedded(repost)

I need someone serious that knows c well to code a program for a POS machine. You will use an interface to interact with the machine's input and output. Interface is open for discussions, however, you will persume you have it already. We make the interface. I attahced a pdf that describes how the POs program should be. Only serious programmers that have the time to do it, please. By the way, the machine's model is CASIO TE-100. IMPORTANT: The machine is low on resources(both memory and cpu), so the program must be super efficient!!! ## Deliverables 1) Complete and fully-functional working program(s) in executable form as well as complete source code of all work done. 2) Deliverables must be in ready-to-run condition, as follows (depending on the nature of the deliverables): a) For web sites or other server-side deliverables intended to only ever exist in one place in the Buyer's environment--Deliverables must be installed by the Seller in ready-to-run condition in the Buyer's environment. b) For all others including desktop software or software the buyer intends to distribute: A software installation package that will install the software in ready-to-run condition on the platform(s) specified in this bid request. 3) All deliverables will be considered "work made for hire" under U.S. Copyright law. Buyer will receive exclusive and complete copyrights to all work purchased. (No GPL, GNU, 3rd party components, etc. unless all copyright ramifications are explained AND AGREED TO by the buyer on the site per the coder's Seller Legal Agreement). ## Platform C, NO C++