Deductible Charged in One Occurrence at Issue

Our client has a BP 00 03 01 06 policy with a $500 policy deductible. The insured sustained a break-in to his barber shop. The actors stole money and business personal property. The carrier insists that the policy states we must apply the policy deductible of $500 plus apply another $200 deductible for the cash that was stolen. It is my opinion that only one deductible applies to the loss and it should be the $500. Could you please review and advise your opinion?

New Jersey Subscriber