How many coins in the coffee mug?

I have a coffee mug that I received years ago as a teacher gift. Seeing as teachers get lots of mugs, this one has never seen coffee. Mostly pens but lately coins. All coins in this house end up in my mug. Yesterday I took my mug of coins to the local CoinStar machine. Those pennies, nickels, dimes and quarters do add up. In this case $50.54.