We have exceeded 14500 records. we want to delete some records would free up for more entry. how do I delete customer records in bulk? i did the export into a spreadsheet edit the sheet. now i need to updated the records, I don't really understand the import part. I save the file but when i import it i get the message that says the sheet is not correct format.  also another option I get another sheet opens up with instruction and and says paste the data here. the header is not the same as my exported file. can anyone direct me to a right way of doing this? 

Thanks