Is it true? You have 90000 dollars in your bank account and you have 300,000 dollars in your account. Or there is a sack (only one) in your locker carrying 300,000 dollars.

In this sentence above, there are 20 gallons of petrol in the tank. What is the cost of this?

I think it should be: There are 20 gallons of petrol in a Chevy

tank.