WHY

@echo off & setlocal enabledelayedexpansion
set "mac=002B6341B075"
set /a x = 1

for /L %%i in (6 6 12) do (
    set /a y = 0x!mac:~-%%i, 6! + x, x = y / 0x1000000
    cmd /c exit !y!
    set "result=!=ExitCode:~2!!result!"
)

echo;!result!
pause
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