#teeth-whitening
Bookkeeping for teeth-whitening studios and mobile services, including package revenue deferral, inventory shelf life, and cosmetic-vs-dental licensing distinctions
牙齿美白工作室的疗程毛利率往往超过85%，但许多工作室仍然亏损，原因在于过早确认预付套餐收入、忽略库存保质期核销，以及未能正确归类与本州"美容还是牙科"分类相关的牌照费用。
