How Much Did I Lose on This Slot Machine by Going Too Fast?

It’s 20 yrs ago (no, I was not three) and we arrived at a casino in Vegas. I was SO excited, I raced up to a slot machine and started feeding it quarters as fast as I could ; in fact, SO fast that when I soon got ALL 7’S I put another quarter in without stopping then I turned white with horror realizing what I had stupidly done. How much did I lose?