u/Mobile_Setting_101

Im a new employee and I want to get more shirts and hats but it seems like the option is POS checkout. What does that mean? And is there any way i can buy new shirts otherwise? My manager said something about it getting taken out of my paychecl, but my parents are happy to pay for it since its both cheap and for work. If anyone can help it would be greatly appreciated so I don’t have to keep wearing the same shirt everyday