Copy tabulated data from Excel, open plugin, select Table tab and paste data. It is all. You can use numbers with currencies and percent sign.
Chart allows you to connect Google Sheet and update chart's data when Google Sheet is updated. Click
Google Sheets link and follow the instructions in the plugin.
If you want to upload static CSV file click the appropriate link in the Table tab. You can use only comma separated values.
Only valid data will produce valid chart, see examples in Google Sheet to avoid possible problems.