I don't know, but if it had been me I probably would have waited while they figured things out and when I got to the register said something to the manager about waiting,
politely, and more than likely you probably could have gotten one set of the strings free. IMHO/YMMV
I'm a cheap SOB and I try to get as much free as possible in life. You know, came into the world with nothing, can't take nothing with you.
