GTAV - Office - Double $$ Bonus - Export Mixed Goods - $100k - Walker & Sons Warehouse - $34,224/min

Double $$ Bonus Week
$100,000 Profit - $200 Helicopter Hire = $99,800
Total Time = 2 min 55 sec
$99,800 / 2m 55s = $34,224/min
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Talk to the Office Receptionist at the front desk to start an Export Mixed Goods mission.
This will RNG one of your Warehouse locations to start the Mission.
Go pickup the Truck of Goods and deliver it to the Docks.
Best locations to buy Warehouses, the SE corner of the Map near the Docks.