Custom Lightweight POS System with Barcode Integration and Excel-Based Reporting

We require the design and implementation of a lightweight, barcode-driven point-of-sale (POS) system for a small non-profit retail environment. The system must support rapid checkout workflows, minimal user interaction, and structured transaction logging directly into Excel for downstream reporting... (Budget: $30 - $250 CAD, Jobs: Data Analysis, Data Management, Excel, Excel Macros, Excel VBA, PHP, POS development, Software Architecture, Visual Basic)