please answer following 4 questions. last answer choice for #4 is 25%

Which of the following is a period cost? Multiple Choice 0 Cost of labor to assemble products in the production facility 0 Salary of factory supervisor. 0 Salary of the company's CFO. 0 Depreciation of factory maintenance equipment. Golebiewski Corporation has provided the following contribution format income statement. Assume that the following information is within the relevant range. Sales (5,000 units) Variable expenses Contribution margin Fixed expenses Net operating income $150,000 37,500 112,500 35,250 $ 2,25e The contribution margin ratio is closest to: Multiple Choice o 90% O O SOO PM