Something small, but a step in a new direction. I bought the domain and configured the server. This is going to be a single index.php app using SQLite for the database.

One of the columns in the spreadsheet has some quite detailed computations, and I was spinning my wheels before finally solving it. I'm not a spreadsheet genius, so getting this sorted was an absolutely HUGE deal. =ARRAYFORMULA( IF( A2:A<>"", IF( COUNTIF(Items!A:A, A2:A)>1, ...