Greetings!
I have reviewed the files and understand your requirements. I can develop an Excel based solution - at the click of a button, user would be prompted to select the csv file from Amazon. Once selected, the file will be processed and invoices generated and saved to folder specified.
Being a full time freelancer working exclusively on Excel based projects, I work on such Excel based solutions every single day.
If awarded, I can get your work completed to your fullest satisfaction.
Have a Great Day!
Srinivasan Krishnamoorthi