urgenttt!!!! with right answers please

Canadian Tire paid $108 for a humidifier. Expenses are 20% of selling price and the required profit is 24% of selling price. Round ALL answers to the nearest cent if applicable. 1) What is the regular selling price? 2) What is the break-even selling price? 3) During an inventory sale, the humidifier was marked down 15% on the regular selling price. What is the sale price? 4) What is the operating profit or loss during the inventory sale (use a negative sign ( ) for a loss)