With AWS Lambda, you pay only for what you use. You are charged based on the number of requests for your functions and the time your code executes. AWS Lambda is now generally available. The AWS Free Tier includes 1 million free requests and up to 3.2 million seconds of compute time per month with AWS Lambda.
To export data from Excel to a text file, use the Save As command. Delimited text files (.txt), in which the TAB character (ASCII character code 009) typically separates each field of text. Comma separated values text files (.csv), in which the comma character (,) typically separates each field of text.
The first record in a CSV file might represent the names of the following columns of data, and are generally referred to as column headers. Each record in a file with column headers may be have fewer fields in it than the number of column headers. If so, the left out fields' values should be considered empty.