Please help answer questions 1-4 thank you

In a traditional format income statement, sales minus cost of goods sold equals the gross margin. True False In a contribution format income statement, sales minus cost of goods sold equals gross margin. True False Lean production leads to fewer defects, lower inventories, less wasted effort, and quicker customer response times. True False What is manufacturing overhead? 9,000 10,000 12, 500 14,000 none of the above