1. Project Overview

A Java console application that supports three modes—Basic, Standard (8% tax), and Advanced (custom tax & discount)—to compute itemized costs, taxes, discounts, and final totals in PKR. Designed for e‑commerce platforms and financial planning tools.

2. Summary

• Calculation Modes:
  1. Basic (item + delivery)
  2. Standard (item + delivery + 8% tax)
  3. Advanced (custom tax & discount)
• Professional Reporting: Invoice‑style breakdown with currency formatting.
• Robust Validation: Ensures positive quantities, valid rates, and graceful error recovery.
• Continuous Operation: Allows multiple consecutive calculations in one session.

3. My Role & Contributions

• Architected & Developed all modules—input handling, calculation engine, and report generator.
• Implemented Validation to catch invalid costs, quantities, tax, and discount rates with user prompts.
• Designed UX: clear menus, separators, and formatted PKR output for professional clarity.
• Published Documentation: detailed README, demo scripts, and usage examples on GitHub.
• Maintained CI: versioned (v2.0), MIT‑licensed, build‑status badges, and semantic release.

4. Challenges & Learning Outcomes

Challenges:

• Balancing feature richness with console simplicity.
• Handling edge cases (zero quantities, 0–50% discounts, 0–25% tax).