Sales price is $100 per unit. Unit variable cost is $40 per unit. Total fixed costs are $1,200. How many units do you need to sell to earn a target profit of $600? 0 20 units 0 15 units O 45 units 0 18 units O 30 units Which of the following are period costs? (select ALL correct answers) Annual bonus for production support staff Annual depreciation on sales office equipment Sales commissions for sales staff O Monthly rent for the factory building