inventory list, barcode scanner, find a row and add value

Hi everyone. I created a inventory list. My list uses the barcode and I can scan the barcodes and import them in my list. I need a macro for a toggle button to find the specified part (by index: part number or barcode) in my list and add or minus its quantity (value). Please note that I’ve the part number, address, bin number … in my columns and the macro should find the row of scanned barcode, find it in the table and add or minus the quantity. Does anybody help me?