It doesn't have to be exact, but think of what the items cost you or would cost you te replace. As an example, I'd submit something like:
1 suitcase $500
1 suit $500
2 dress shirts shirt$120
4 pairs socks $50
1 pair dress shoes $600
Etc...

If they ask for receipts go through your emails and submit any receipts for any items you've purchased online. Just try to be honest and reasonable.