Notify customer service manager or assistant customer service manager of any problems: customer inquiries or complaints, incorrect prices or poorly marked merchandise, errors/problems with UPC codes, change and coin needed, potential security problems, shrink problems within the store, perishable overstock at check stand (returns), or any unusual problems or situations.8. Machines, tools, and equipment utilized: Scanner, scales, adding machine, check scanner, cash register, shopping cart, POS system, phones/paging system, store computer system, bagging supplies, U-boats, approved cleaning supplies.