The till means the cash register. Look here. q=cash+register+pictures&hl=en&tbm=isch&tbo=u&source=univ&sa=X&ei=WF07UbiPHuTx0wHC9IHgBQ&sqi=2&ved=0CDkQsAQ&biw=1440&bih=770 that’s more where it comes from now I don't know what he means.
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