An alternative up-and-coming contender to the popular response"Thank you; Thanks, Thank you very much, Many Thanks, etc". We will know if becomes commonplace in 50 years (from when this is posted) if people rarely or not all use "Thanks" anymore.
Cashier: I added a free bag to your groceries.
Customer: Perfect, Much Appreciated!
Cashier (Caught off guard; ponder): "What? Well, that was unexpected. That caught my attention"
Fogey/fogy /fougi/ sl. (early 18C+, orig. Scot) old-fashioned, stuck-in-the mud.
Person with old fashioned ideas which he is unwilling to change: Come to the disco and stop being such an old fogey!
You think me an old fogeyand an old tory, his thoughtful voice said. I saw three generations since O’Connel’s time. I remember the famine. Do you know that the orange lodges agitated for repeal of the union twenty years before O’Connel did or before the prelates of your communion denounced him as a demagogue? You fenians forget some things. (James Joyce, Ulysses. Penguin Books,1992. p. 38)