How to get the answers of PartB Q6 and PartC Q7?

Charleston Carriage Company offers guided horse-drawn carriage rides through historic Charleston, South Carolina. The company shut down in 2020 because of the Covid virus, and it doesn't expect to resume business until next year, 2022. The carriage business is highly regulated by the city, and the expected fare for all passengers in 2022 is $19.50. The company budgets the following monthly operating costs for 2022:

Fee paid to the city of Charleston	17% of ticket revenue
Cost of souvenir set of postcards given to each passenger	$0.50 per set
Monthly cost of leasing and boarding the horses	$45,000
Carriage drivers (tour guides) are paid on a per-passenger basis	$3.00 per passenger
Monthly payroll costs of non tour guide employees	$7,500
Marketing, web-site, telephone, and other monthly fixed costs	$7,000

In addition to these costs, Charleston Carriage will have to pay a brokerage fee of $1.10 per ticket sold by brokers. On average, 65% of all tickets sold are sold by brokers; 35% are sold directly by Charleston Carriage. Charleston Carriage has several questions about its expected monthly revenues, costs, and profits in 2022.

Part B [8 tries; 8 points] 3. What is Charleston Carriage's estimated monthly operating income in 2022 if the number of monthly passengers is 8,600? 43442 4. How many monthly passengers would be required for Charleston Carriage to break even in 2022? 4971 5. How many monthly passengers would be required for Charleston Carriage to earn $110,000 per month in 2022? 14160 6. Assuming a tax rate of 31%, what must ticket revenue be in order for Charleston Carriage to earn $110,000 per month in 2022?

Part C [4 tries; 4 points] 7. Charleston Carriage has an opportunity to negotiate with the company that leases the horses and boards them. If Charleston Carriage expects to sell 5,971 tickets per month in 2022 and wants to break even each month, what's the most it could pay per month to lease and board the horses (ignoring taxes)?