two quick multiple choice questions help please! (gross profit and manufacturing firms)

In a manufacturing firm, inventories consist of: Raw material, finished goods, and cost of goods sold Raw material, cost of goods manufactured during the period, and finished goods Raw material, work-in-process, and finished goods O Raw material and finished goods Finished goods and work-in-process Gross profit: Equals net sales less cost of goods sold Less total expenses equals net income Must cover all operating expenses to yield a profit for the owner of the business All of the above Is also called gross margin