Instructions for Using the Fabric Cost Calculation Plugin:
1. Input Values: The plugin requires several input values to calculate the fabric cost. Please provide all required values as follows:
  - Warp Density (e.g., 60): The number of warp threads per unit width of the fabric.
  - Warp Yarn Count (e.g., 120): The yarn count for warp threads.
  - Warp Yarn Unit (e.g., "Denier", "Nm", "Ne"): The unit of the warp yarn count.
  - Warp Price (e.g., 6.30): The cost of the warp yarn per kilogram.
  - Warp Wastage Factor (e.g., 1.1): The wastage factor for warp yarn, typically a percentage value greater than 1.
  - Weft Density (e.g., 22): The number of weft threads per unit width of the fabric.
  - Weft Yarn Count (e.g., 28): The yarn count for weft threads.
  - Weft Yarn Unit (e.g., "Denier", "Nm", "Ne"): The unit of the weft yarn count.
  - Weft Price (e.g., 2.70): The cost of the weft yarn per kilogram.
  - Reed Width (e.g., 170): The width of the fabric on the loom, in centimeters.
  - Manufacturing Unit Cost (e.g., 0.03): The manufacturing cost per weft yarn, in dollars per pick.

2. Decimal Separator: If you use a comma as a decimal separator (e.g., "6,3"), it will automatically be converted to a dot (e.g., "6.3"). Ensure you input the correct format for the value.

3. Valid Values: All input values must be valid numbers. Negative values are not allowed. Please make sure to provide numbers greater than or equal to zero.

4. Output Values: The plugin will return the following calculated values:
  - Warp Yarn Denier: The denier value for the warp yarn.
  - Weft Yarn Denier: The denier value for the weft yarn.
  - Warp Weight per Meter: The weight of the warp yarn used per meter of fabric, in grams.
  - Weft Weight per Meter: The weight of the weft yarn used per meter of fabric, in grams.
  - Warp Cost per Meter: The cost of the warp yarn used per meter of fabric, in dollars.
  - Weft Cost per Meter: The cost of the weft yarn used per meter of fabric, in dollars.
  - Manufacturing Cost per Meter: The cost of manufacturing per meter of fabric, in dollars.
  - Total Fabric Cost per Meter: The total cost of the fabric per meter, in dollars.

5. Error Handling: If any input value is missing or invalid, the plugin will throw an error message indicating which value needs correction. Make sure all inputs are properly formatted and provided.