signing a commercial lease questions

Few questions could anyone help me clarify what is the norm:


1. When you take up a lease for a commercial premises, is it normal to have to pay four months rent up front (ie 3 months deposit, one month in advance)?


2. If the rent price that has been negotiated throught the agent with the landlord is the exclusive price, and you are to pay the rent only to the landlord every month, and the management fees and rates are paid separately to the mgmt office and government, then for the initial agent's commission are you suppossed to pay 1/2 of the rental price or 1/2 of the TOTAL price (incl 1/2 of the mgmt fee and rates)?


3. And for the deposit, is it normal to have to pay the 3 mths deposit for the inclusive price, and not just the rental price? As this property's mgmt fee is really expensive it makes a big difference for the deposit and agents fee. Can anyone share with me their experiences of this? BTW, it's only a small office 600sq ft. Thank you