10).Sales is $100 per unit; direct material is $22 per unit; direct labor is $18 per unit; overhead is $8 per unit and $1,800 per month; selling and administrative expenses are $5 per unit and $1,400 per month. Selling and administrative expenses are:

a).mixed b).variable c).fixed d).None of these

11).Sales is $100 per unit; direct material is $22 per unit; direct labor is $18 per unit; overhead is $8 per unit and $1,800 per month; selling and administrative expenses are $5 per unit and $1,400 per month. Selling and administrative expenses are:

a).Period costs b).Product costs c).Manufacturing costs d).none of these

12).Cost of goods sold is a:

a).product cost b).period cost c).balance sheet cost d).selling cost