What happened ?

So I find myself venting and decided to share. I was pressed for time today finishing a long work week and stopped at Wendy's for a quick bite. As it was noon the lunchtime crowd was in full swing. The gal at the register being approximately 18-20 years of age was doing her best to keep up with all the little demands customers were bellowing at her when suddenly the register stopped working. She suddenly panicked because she didn't know how much change to return to her current customer. She yelled to the manager "this lady gave me $14.00 and her bill was $13.41 how much do I give her back?" What ? did she really just ask that ? To which I shouted .59 cents which she didn't hear so I did it again. The lady at the counter turned to me and said take it easy she's under alot of pressure, to which I replied it's not pressure it's called simple arithmetic which produced muffled snickers among the crowd. Now I did not do this embarrass or offend anyone but for some reason I became quite irritated with this girls inability to perform simple calculations in a job that may sometimes require it. Perhaps I am just getting old and cranky but I do find it disturbing that the next generation of America just doesn't seem to be up to the task, I don't say this because of this one example I have seen many others and it's troubling. In any case your feedback is always welcome.

So the question is am I just a cranky old man or do my observations hold true ?