The POS Billing module provides a fast and interactive interface for product selection, billing, and customer checkout. Below is a comprehensive guide on how to use all features of the billing screen.

✅ Customer Selection:

• Mandatory First Step: You must select a customer before adding any products
• Customer Details Display: Shows name (e.g., "Bobby sal") and phone number (e.g., "5224555555")
• Delivery Options: Choose between "Take Away" or "Delivery"

✅ Adding Items:

• Category Navigation: Browse products by category (e.g., "PC3", "Customers", "Requests")
• Product Display: Shows product name and price (e.g., "Almoda $11.00", "Avakado Tree $1.00")
• Quick Search: Use the "Search by Product Name or Code" field to find specific items
• Check Out: Finalize the transaction and complete the sale
• Reset: Clear the current transaction and start fresh
• Net Total: Verify the final amount (e.g., "$23.54") before completing

✅ Order Summary:

• Itemized List: Shows all selected products with quantities
• Price Calculation: Automatic calculation of subtotals
• Discount Application: Use "Select Discount Type" dropdown to apply discounts
• Tax Calculation: System automatically calculates tax (e.g., "$1.54")

✅ Completing Transaction:

• Payment Amount: Displays total amount due (e.g., "23.54")
• Payment Method: Select from available payment options
• Order Notes: Add special instructions in "Enter Your notes" field
• Final Summary: Clear breakdown of:
  • Total Products
  • Tax amount
  • Discounts applied
  • Shipping charges
  • Total Payable amount

💳 Payment Options Guide:

• Card: Used when the customer pays using a credit or debit card. Supports integration with a card reader device (automatically detects connected reader). You can also process card payments manually if the reader is unavailable.
• Cash: Used for direct cash payments. The system automatically calculates the change return based on the entered amount. Ideal for walk-in or offline customers.
• Zelle: Supports Zelle online transfer. Enter the received amount once the payment is confirmed. Usually used for digital or contactless transactions.
• Card (Manual): Allows manual entry of card details if the reader device is disconnected or not functioning. The operator can process payment manually through a secure terminal.
• Send Invoice: Used when the customer prefers to pay later. The system sends a digital invoice to the customer’s registered email. Commonly used for business clients or delayed payments.

🧾 Example Flow:

1. Enter the Paying Amount and check the Change Return.
2. Select the desired Payment Method (e.g., Cash, Card, Zelle, etc.).
3. Add any Notes in the “Enter Your Notes” field.
4. Review the Order Summary section:
   • Total Products
   • Tax
   • Discount
   • Total Payable
5. Click Submit to finalize the payment and generate the receipt.

• Review Total Payable: Check the "Total Payable" amount in the Order Summary ($16.05).
• Confirm Order Summary: Verify Total Products (1), Tax ($1.05), Discount ($0.00), and Shipping ($0.00).
• Enter Received Amount: Input the amount you're paying (e.g., $20) in the "Received Amount" field.
• Check Change Return: Confirm the "Change Return" (e.g., $3.95 for $20 received).
• Select Payment Method: Choose your method (e.g., Cash) from the "Payment Method" dropdown.
• Add Notes (Optional): Include any notes in the "Notes" section if needed.
• Cancel if Needed: Click "Close" to exit without processing.
• If payment successful

❌ Common Issues:

• Products not adding to cart? Ensure you've selected a customer first
• Incorrect totals? Check discount and tax settings
• Missing payment options? Contact system administrator