Epicor 9.05.702 - CK71 Handheld Scanners - Barcoding - How to deal w

Example: “Q” is the prefix qualifier on a quantity barcode printed on a label.
How do you deal with “Q” qualifier in the barcode field of an number field such as quantity?
How do you removed the “Q” and enter then number?
How do you use the prefix qualifier such “Q” to make sure you have the correct barcode scanned?