I do not know if these are right and I would love to have them checked. Thanks :)

If an organization wants to make a profit, it must generate more sales revenue than the total costs it incurs. This relation can be expressed using which of the following profit equations? Operating income = [Contribution margin per unit x # units sold] - Fixed costs O Operating income = Sales revenue - Total variable costs - Committed costs O Operating income = [Sales price per unit - Fixed cost per unit) x # units produced] - Variable cost O Operating income = Sales revenue - Product costs - Discretionary costsIf the activity level increases, what happens to the unit fixed cost? O It increases. It remains the same. It decreases. O It depends on how much the activity level increases.If selling price is $100 per unit, variable cost is $70 per unit, and fixed cost is $200, calculate the contribution margin ratio. O 200% O 50% O 14% O 30%1.2 pts Jenny's Cutting Station is a new concept in haircuts; low cost and very quick. Set in a local mall, Jenny's offers 15-minute haircuts for harried shoppers who do not have time for lengthy appointments. To ensure that the clients are in and out quickly, she schedules her 5 employees based on expected client traffic. Each of the employees is paid $1,200 per month, with part of their pay coming from client tips. Jenny pays rent and overhead costs of $2,000 per month. Because of the quick nature of the service, Jenny doesn't have time to clean combs in between clients, so she uses a new comb for each customer, at a cost of $0.55 each. She also provides shampoo and conditioner for each client at a cost of $0.95 per client. The average price for a haircut is $12. Jenny pays herself $5,000 per month. What is Jenny's contribution margin ratio? O 87.5% 12.5% 83.5% O 8.3%The formula for a contribution format income statement is Sales revenue - Discretionary costs = Gross profit - Committed costs = Operating income. Sales revenue - Cost of goods sold - Discretionary costs = Operating income. O Sales revenue - Step costs = Contribution margin - Fixed costs = Operating income. Sales revenue - Variable costs = Contribution margin - Fixed costs = Operating income