Enatega Restaurant and Rider Application : The total amount is calculated incorrectly when more than one quantity of an item is added

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Describe the bug
The sub-total amount is calculated incorrectly when more than one quantity of an item is added. This leads to inaccurate totals, impacting the functionality of the application (e.g., shopping cart or order summary).
Also the Add-ons price is not adding up in subtotal amount.

To Reproduce
Steps to reproduce the behavior:

Go to 'Enatega Customer Application'
Now place an order from any restaurant.
Now add a single-product with 2 quantities , see error that the Total will be showing the price of just One quantity that is incorrect.

Expected behavior
The total should correctly multiply the price of an item by its quantity when more than one quantity is added.
The total amount displayed should match the expected result for all items in the cart or order.

Smartphone (please complete the following information):

Device: [e.g. Infinix Hot 50]
OS: [e.g. Android]
Browser [e.g. Application]
Version [e.g. Latest]

Start in the Enatega Customer Application and reproduce the issue by adding one product with quantity 2, then check the cart or order summary subtotal. Verify the calculation for repeated quantities and add-ons against the expected total; done means all displayed totals match the item prices, quantities, and add-on prices.

Written by the indexing model from the issue text.