So confused pls help, explain with lots of detail.

Mrs Messina, the owner of the Messina Ice Cream company, is deciding between two new flavors to be produced in her factory: Mint Chocolate (worst flavor of ice cream btw) or Tiramisu (best flavor of all time). Whichever flavor is produced, she expects to produce and sell 55000 units at the selling price of $15 per unit. Mint Chocolate: Variable Costs = $8 per unit, annual fixed costs of $140000 Tiramisu: Variable Costs = $5 per unit, annual fixed costs of $180000 5. Mrs Messina wants to make a minimum of 30% of their Total Costs as profit from the Tiramisu flavour. How many units must she sell to achieve this? Challenge Question: 6. At what volume would Mrs Messina be indifferent between either flavour