How to use Matrix item in RMS?

Hi,

I have created a Matrix item in RMS and would like to know if it can be used in this way

- Cashier scans a general barcode "BOXES"

- system brings up the items I have created i.e. "square Boxes", "rectangular Boxes", etc etc

- Cashier selects the item via touchscreen

Is this how a Matrix item works in RMS? or is it just for the ease of creating the same type of items in RMS?because each item in the matrix has its own barcode/unique identifier, it will be quite difficult to ring up all the items individually at the cashier if cashier have to scan each and every item