Use the following information to determine the net income or loss of a plumber, operating as a sole trader. Cash A/C 22,000 Plumbing supplies A/C 5,000 Plumbing service revenue A/C 40,000 Wages expenses for helper A/C 3,000 Salaries paid to accountant A/C 2,000 Supplies expenses A/C 1,500 Rent expenses A/C 1,200