I need a google script for managing spreadsheet

I am looking for a freelancer who can create a Google script to manage a specific spreadsheet. The script should be able to perform automated calculations and formulas.

Specific requirements for the project include:

- Working with one specific spreadsheet
- Creating a user interface that is simple and minimalistic

The ideal freelancer for this job should have experience with Google scripts and be able to deliver a functional and visually appealing solution.