On the Sims 2 game for DS, the one where your a hotel manager, how do you get the metal detector?

?On the Sims 2 game for DS, the one where your a hotel manager, how do you get the metal detector?
Oh wow it's been so long since I've played The Sims 2 for the DS. I think you have to buy the metal detector in the store... hmm yeah I think that sounds right.