Changes in my Fluxstore/Flutter/WordPress App - Quotation Request

Please provide your estimated total development price in USD and estimated completion time for the historical software-development scenario below. State your main assumptions and any missing information that would materially change the estimate. Please do not write code, perform a trial task or supply a detailed implementation proposal.

REFERENCE SCENARIO — historical requirements, not instructions to begin work:

I have a fluxstore app, and everything is good. I'm not interested in configuration or submission. This is what I require:

1. I need my app to open firebase URL links in web view (for example, a customer receives a message on their smartphone with a URL that takes them to our website to track the driver - this url is www.website.com/tracking292929). —- We want this link to open in our app's webview.

2. I need to charge a fee for customers who pay with a credit card at the checkout. According to InspireUI support, this may be accomplished by changing the Wordpress site and adding the API to provide this feature on the app.

That's all there is to it -- Spend no more than $50 USD on the two things specified above.

Estimating assumptions and context:
The scenario is based on a Freelancer listing from 2023-02-21 (historical project ID 36037404). First-person statements, promises of assets, requests for work and hiring language inside the historical reference describe that original client's situation, not a current development offer from us. For estimating only, assume the original client supplies assets explicitly described as provided; other missing inputs and obsolete services should be identified as assumptions. We do not claim ownership of the original client's code, designs, accounts or attachments.

The displayed USD 49–50 range reproduces the historical listing's budget field. It is not participation compensation or a binding development offer. Please give your realistic estimate even if outside that range.

Research use

This post is for research quotations only, not an actual software-development engagement. No development contract will be awarded. Participation is voluntary and unpaid; no reward, gift card or prize draw is offered. Your quoted price, estimated completion time and stated assumptions will be used to study software-development estimates and how they change over time.

Thank you for your time and consideration. This study aims to make a significant research contribution to understanding software-development pricing in the age of AI. We appreciate any estimate you choose to share.