# Stock Readjust Valuation

This module allows for the retrospective adjustment of product costs and Cost of Goods Sold (COGS) based on a calculated weighted average cost over a specified period. It is designed to correct valuation discrepancies and ensure accurate financial reporting, particularly for Point of Sale (POS) transactions.

## Features

*   **Period-Based Readjustment**: Define a Start Date and End Date to calculate the Weighted Average Cost of products based on Initial Stock and Purchases within that period.
*   **Initial Stock Correction**: Automatically readjusts the value of the stock on hand at the Start Date if the target cost differs from the historical cost.
*   **COGS Readjustment**: Propagates the new Average Cost to all Outgoing Stock Moves (Sales, Manufacturing, etc.) within the period.
*   **POS Accounting Correction**: Specifically handles POS transactions by creating secondary accounting entries to move the cost difference from the Interim Stock Output account to the Final POS Expense account.
*   **Traceability**:
    *   Generates a unique sequence (`ADJ/XXXXX`) for each readjustment record.
    *   Smart Button to view all generated Accounting Journal Entries.
    *   Detailed references in Journal Entries linking back to the Readjustment record, Stocks Moves, and POS Sessions.

## Accounting Logic

### 1. Initial Stock Adjustment
*   **Trigger**: Difference between `Initial Value` and `Target Initial Value`.
*   **Accounting Date**: **Start Date** of the Readjustment Period.
*   **Entry**: Adjusts `Stock Valuation` vs `Expense/Gain-Loss`.

### 2. COGS (Delivery) Adjustment
*   **Trigger**: Outgoing Stock Moves within the period.
*   **Accounting Date**: **End Date** of the Readjustment Period.
*   **Entry**: Adjusts `Cost of Goods Sold` vs `Stock Valuation`.
*   **Calculation**: `(New Cost * Qty) - Abs(Current Value)`

### 3. POS Specific Adjustment (Secondary Correction)
*   **Trigger**: Outgoing Moves linked to POS Orders.
*   **Context**: POS transactions typically move cost from `Stock Valuation` -> `Interim Output` (Delivery) -> `Expense` (POS Session Closing).
*   **Primary Correction**: Adjusts `Stock Valuation` vs `Interim Output`.
*   **Secondary Correction**: Adjusts `Interim Output` vs `Final Expense`.
*   **Accounting Date**: **End Date** of the Readjustment Period.
*   **Reference**: Includes POS Order and POS Session Name for easy reconciliation.

## Usage

1.  Go to **Inventory > Operations > Stock Readjustment**.
2.  Create a new record.
3.  Select the **Product Category** (optional filtering) and set the **Date Range**.
4.  Click **Load Products** to populate the lines with products that had stock or moves during the period.
5.  Review the `Qty at Start`, `Valuation at Start`, and `Purchase Value`.
    *   You can manually edit `Qty Counted` and `Target Initial Value` if the system computed values need overridings.
6.  Click **Calculate** to see the `New Average Cost`.
7.  Click **Apply Readjustment** to post the corrections.
8.  Use the **Journal Entries** smart button to review the posted moves.