Enatega Customer App: There should be all the details related to the total amount on order checkout screen

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Describe the bug

Some cost components (such as taxes, delivery fees, or discounts) may be missing.
The final total may be displayed without a clear breakdown.
Users might not be sure how the total amount was calculated.

Steps to Reproduce:

Add items to the cart and proceed to checkout.
Observe whether all cost components (subtotal, taxes, delivery fee, etc.) are displayed.

Expected behavior
The checkout screen should provide a detailed cost breakdown, including:
✅ Item subtotal
✅ Taxes (e.g., VAT, GST, Service Tax)
✅ Delivery charges (if applicable)
✅ Discounts or vouchers applied
✅ Final total amount to be paid

Desktop (please complete the following information):

OS: [e.g. iOS]
Browser [e.g. chrome, safari]
Version [e.g. 22]

Smartphone (please complete the following information):

Device: [e.g. All devices]
OS: [e.g. iOS8.1]
Browser [e.g. stock browser, safari]
Version [e.g. 22]

No file, test, or entry point is named. Start by locating the React Native checkout screen and the code that calculates or renders the order total. Confirm the screen shows the subtotal, taxes, delivery charges, discounts, and final amount, then verify the checkout flow on a device or emulator.

Written by the indexing model from the issue text.