Agrocery store manager who uses computer software at the scanners on the checkout counters to track inventory levels is using a(n):

POS system

Explanation:

Based on the information provided within the question it can be said that the grocery store manager is using a POS system. A Point of Sale System is a system that is used to allow customers to make a payment for a product or service at your store. Cash registers and Checkout Counters are examples of this, and when the customer completes a transaction it is a point of sale transaction.

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