Fire alarm requirments for a commercial building group 'B'

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Per florida building code:
A manual fire alarm system, which activates the occupant notification system in accordance with Section 907.5, shall be installed in Group B occupancies where one of the following conditions exists:

1. 1.The combined Group B occupant load of all floors is 500 or more.
2. 2.The Group B occupant load is more than 100 persons above or below the lowest level of exit discharge.
3. 3.The fire area contains an ambulatory care facility.

Exception: Manual fire alarm boxes are not required where the building is equipped throughout with an automatic sprinkler system installed in accordance with Section 903.3.1.1 and the occupant notification appliances will activate throughout the notification zones upon sprinkler water flow.

My building is a single story building. With an occupant load of 200 (Florida). Group B building. Not Sprinkled. Based on the above it dosent need a fire alarm system from my understanding. Does number (2) of The Group B occupant load is more than 100 persons above or below the lowest level of exit discharge play a role in a single floor building? I find #2 a bit confusing.

Thank you,