Pos Inventory System Basic Free Retail POS/Inventory System?

Basic free retail POS/Inventory system? - pos inventory system

I work Sprint Store sells and we have an inventory system is doing what so ever. I spoke with my boss and he agreed to pay, if I could use a system of inventory in stores to save her. The problem is that OP retailers we use is also for what we do, complicated, and we do not really know how (it is free to use it). I was wondering if someone just doing a simple job, what we want without having to know, too complicated. just an inventory and POS system that is more professional and easy to use and allow employees to apply discounts to the area. Additional features are nice and you can use more than that, but what are the essential characteristics. Thanks