Invoice Data Extraction Automation CSV/Excel Expert Needed

I am looking for a freelancer to analyze 11 Excel/CSV invoice files from a fulfillment/logistics provider.

The task is to create a clear monthly overview of all services that were billed.

What I need, per month:

* A list of all different services that were charged
* How many times each service was charged (quantity)
* The price per service
* The total amount per service
* The grand total of all services combined for that month

This must be based strictly on the invoice data. No assumptions or interpretation.

Additional details:

* There are 11 Excel/CSV files in total
* Service names must be exactly as written in the invoices
* Some services appear many times within the same month
* Accuracy is more important than speed
* The output must be a clean, well-structured Excel file

Deliverable:

* One Excel file showing a clear monthly breakdown of services and totals

When applying, please include:

* Relevant experience with invoice or financial data analysis
* Estimated time to complete the task
* Your fixed price for the full job