Smart 50/15/5/30 Budget Calculator & Financial Planner with Rwandan Franc (RWF) & Multi-Currency Support
# 🇷🇼 Smart Budget Calculator & Financial Planner
> **Rwandan Franc (RWF) & Global Multi-Currency 50/15/5/30 Financial Management Tool**
An interactive, high-performance financial web application built on the **50 / 15 / 5 / 30 Rule** advocate model. Tailored for users in **Rwanda (RWF / FRw)** and worldwide, featuring multi-currency conversion, custom ratio allocation sliders, an itemized expense checker, long-term compound growth forecasting, and printable PDF/CSV report exports.
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## ✨ Features
### 1. 🇷🇼 Rwandan Franc (RWF) & Multi-Currency Engine
- Native support for **Rwandan Francs (`1,200,000 FRw`)**, **US Dollars (`$`)**, **Euros (`€`)**, and **British Pounds (`£`)**.
- Real-time exchange rate conversion toggle between local currency and foreign currency values.
### 2. 📅 Multi-Cadence Income & Frequency Options
- Enter take-home income **Per Paycheck**, **Monthly**, or **Annual**.
- Supports flexible pay schedules: **Monthly**, **Bi-weekly (Every 2 weeks)**, **Semi-monthly (Twice a month)**, and **Weekly**.
- Category cards automatically calculate allocations across **Per paycheck**, **Per month**, and **Per year** with active cadence highlighting.
### 3. 📊 Budgeting Rules & Custom Ratio Sliders
- **50 / 15 / 5 / 30 Rule** (MoneyLetter Standard: 50% Needs, 15% Investing, 5% Emergency, 30% Wants).
- **50 / 30 / 20 Rule** (Classic Financial Plan: 50% Needs, 30% Wants, 20% Savings).
- **70 / 20 / 10 Rule** (High Cost-of-Living: 70% Needs, 20% Savings, 10% Investing).
- **Custom Ratio Builder**: Interactive sliders allowing users to craft personalized allocation percentages totaling 100%.
### 4. 📝 Itemized Expense Checker
- Itemize individual monthly bills (e.g., *House Rent in Kigali*, *REG Electricity & Water*, *Moto & Taxi Transport*, *Food*, *RNIT Mutual Fund*, *Bank Emergency Deposit*).
- Displays real-time status indicators (e.g. `Within Limit` or `Over Target by 25,000 FRw`).
### 5. 🚀 Long-Term Wealth Growth Forecast
- Simulates compound gro …