Enhance transaction categorization and tax calculation logic; improve…

[henryhabib]

This pull request introduces updates to the transaction categorization logic and refines the calculations for tax and discounts in app.py. The main focus is on improving the accuracy and flexibility of financial computations.

Transaction Categorization:

• Added a new category for transactions with amounts greater than 10,000, now labeled as 'Very Large Expense' in categorize_transaction.

Calculation Logic Improvements:

• Adjusted the lowest tax bracket threshold in calculate_tax from 10,000 to 5,000 for more granular tax calculation.
• Refactored the discount calculation in calculate_discount to apply a 1% reduction iteratively for each percentage point of discount_rate, instead of a direct multiplication, resulting in a more accurate discounted price.… discount calculation method

[Copilot]

Pull request overview

This pull request enhances the financial computation logic in the personal finance tracker application by refining transaction categorization, tax brackets, and discount calculation methods. The changes aim to provide more granular categorization for high-value transactions and improved accuracy in financial calculations.

Key Changes:

• Added a new 'Very Large Expense' category for transactions exceeding $10,000
• Lowered the lowest tax bracket threshold from $10,000 to $5,000 for finer-grained tax calculation
• Refactored discount calculation to use an iterative 1% reduction approach instead of direct multiplication

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