Custom Table with Short Code and Data Import for WordPress

We need a table made where we can import data to populate some of the fields. we are importing multiple xls files:
1. to update an existing record.
2. to add new records

The table needs two columns that show a ‘buy now’ button, the price of the button will be determined from a price table in the row at the backend.

we would like to import the data from an excel sheet to update the tables. but, we want to show at the front end the date with the highest values of row. there will be two rows of data but only the highest row of data do we want shown at the front end.