If tesla manage to produce 55.000 model 3 in this quarter, it will use (55.000X80,5=) 4.430 GWh batteries.
If it manage to produce only 50.000 model 3, then it will use (50.000X80,5=) 4.030 GWh batteries.
Early on August tesla confirmed that Gigafactory 1 battery production was at '~20 GWh'...