assist with this.

AP-5A LO 4 The Crazy Hair Salon provides special-occasion haircuts and generates average revenue of $50 per customer. The salon's fixed costs are $40,000 per year, which include rent, utilities and magazine subscriptions. Its variable costs are $20 per customer. Target operating income for the year is $90,000. Required a) Calculate the revenues needed to obtain the target operating income. b) How many haircuts have to be provided to earn an operating income of $80,000? To breakeven? c) Calculate the operating income if 6,000 haircuts are provided. 99