Please with exlanation :)

5. Ralph Co. produced and sold 180,000 units of products in 2022 and prepared the following contribution margin income statement. Required: (1) What is Ralph's margin of safety in units? (2) Determine the sales revenues that ensures the pretax profit of $1,800,000 assuming the tax rate is 28%. (3) How many units should Ralph produce and sell that yields the after-tax profit of $1,337,040 assuming the tax rate is 28%. 5. Ralph Co. produced and sold 180,000 units of products in 2022 and prepared the following contribution margin income statement. Required: (1) What is Ralph's margin of safety in units? (2) Determine the sales revenues that ensures the pretax profit of $1,800,000 assuming the tax rate is 28%. (3) How many units should Ralph produce and sell that yields the after-tax profit of $1,337,040 assuming the tax rate is 28%