How much in expenses do over the road owner operator truck driver have?

How much in expenses do over the road owner operator truck driver have?
In 1976, leased on with Bekins Van Lines, I grossed just over $120,000. In today's rate, (1=3.80)that would be about $460,000. After paying for insurance, taxes, fuel and maintenance and a $600 truck payment, I netted around 31,000 bucks. And the rent and groceries and other personal expenses came out of that. With a wife and five kids, it didn't go very far.