Josie, your best friend, is having a huge Sweet Sixteen party. She has designated you to address all 100 of the envelopes (using labels). Explain why using Mail Merger would be to your benefit as opposed to writing out the labels.

You add all the addresses into excel and and do mail-merge with the invitation. Adding the 100 addresses is probably a lengthy process but once this is complete you can just add on addresses and once a year or whenever you have to mail something to everyone, it's a only mouse-click.