Add % markup to column in .csv file

I have a .csv file that is generated by our Point of sale software. This csv file has multiple columns for products and descriptions as well as dates included in it. One of the columns is for price. I need someone to write an app that will change the price in that csv file. The app should work as described below: A csv file is output to a folder from our POS system. When the time stamp on that file changes, the app will wait 90 seconds, then open that file and change the price column to add a 10% price increase. then the app will output a new csv file as a different name. ## Deliverables I have attached an example of the csv file. ## Platform This will run on a windows 2003 server.