2.5 pts Question 12 Which of the following is a period cost? (select ALL correct answers) assembly workers' wages ($15 per hour) monthly salaries of sales supervisors ($6,000) annual rent for the factory building ($50,000) marketing manager's bonus (a fixed percentage of sales) Question 13 2.5 pts Which of the following changes increase operating risk (select All correct answers) an increase in fixed costs increase in sales price an increase in sales volume an increase in operating leverage 2.160