In this Excercise, why the difference in the Accounts Payable Account (utilities) makes utilities expense decrease?

Newman Consulting Company maintains its records on a cash basis. During 2018 the following cash flows were recorded: cash received from customers, $420,000; and cash paid for salaries, utilities, and advertising, $240,000, $35,000, and $12,000, respectively. You also determine that customers owed the company $52,000 and $60,000 at the beginning and end of the year, respectively, and that the company owed the utility company $6,000 and $4,000 at the beginning and end of the year, respectively. Determine accrual net income for the year