I can do the job! I have the programming experience and being an engineer Í´ll understand any backward math required for goal seek. I suggest inserting the macro as an add-in button on the excel ribbon bar to have it readily available for use.
I'm an engineer with advanced working knowledge and experience in Excel and VBA including interaction between different software (Word, Excel, Powerpoint, Access, MS Project, Autocad etc.), web scraping, Access DB design, management Dashboards, stock and financial worksheets, KPI's, proficient coder in VB.Net, C#, Python, JavaScript (google sheets), VB6.
Communication won't be an issue because I was raised in USA (Charlottesville Virginia) so English is my second mother tongue. Also, I have IELTS certification with global score of 7,5 over 9.