How to see network fees from past transactions on LBC

[crystal67btc]

I've been trading for a few days on LocalBitcoins.com and am just starting to keep a spreadsheet record of all transactions.  I want to make note of the network fee that is incurred every time I buy/sell, does anyone know where I can get this data? It doesn't show up in my wallet's transaction record or in each individual contact summary/receipt.  Help much appreciated - thanks!