🧾 Monthly-Bill-Generator

This project is a Monthly Bill Generator built in Python for a workspace rental company. It takes a list of rented items (with start and end dates, rate, and quantity) and calculates a prorated monthly invoice based on usage during a given month. It groups similar items, calculates partial usage accurately, and returns the final monthly bill.

This repository contains a solution to the Python Developer assignment given by Novel Office. The task focuses on generating a monthly invoice for rented items (furniture or space resources), accurately calculating the prorated cost for each item depending on usage duration within a given month.

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📌 Problem Statement

A company rents out furniture and space resources with specific start_date and stop_date for each item. Each item has a rate and quantity. Some items are used for partial months or overlap across different months.

We need to generate a monthly invoice that:

• Includes only items active during the target month
• Prorates the cost for partial-month usage
• Groups similar items (by item_code, rate, and billing period)
• Returns a total bill for the month.

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🧾 Input Format

1. item_list: List of Dictionaries

Each dictionary represents a billing item with keys like:

• item_code
• rate
• qty
• start_date
• stop_date

2. target_month: String

"2024-11"  # Format: "YYYY-MM"