What’s the write up policy?

I got my first write up today for my drawer being down $11 the other day. I’m not sure what happened and my manager wasn’t mad but I signed everything and totally understand I made a mistake somewhere. Everywhere I’ve worked has had the policy that write ups expire over time and it’s a 3 strike policy. What’s DTs policy? He told me that some associates in other stores have gotten 5 or more and still have their jobs. I’m just kinda confused and I don’t want to bug my manager anymore than I have to.