James gets a fleet of gas transportation vans.  He gets 6 vans.  2 of them are 8000 gallons.  1 of them is 30% less than that.  The remaining trucks are 50% larger than the 2 trucks.  How many gallons can he transport?
His smaller truck is 8000*.3=2400 gallons smaller
So it can transport 8000-2400=5600 gallons
There are 6-2-1=3 of the very large trucks
Those trucks are each 8000*.5=4000 gallons larger
So they can transport 8000+4000=12000 gallons
So in total they transport 3*12000=36000
The 8000-gallon trucks can transport 8000*2=16000 gallons
So in total he can transport 5600+16000+36000=57600 gallons