Can you confirm this correct and assist with the solution.

Requirement 5. Determine the formula, then compute the sales in units to achieve a profit of $18,000, assuming no change in selling price and assuming the following given information: Selling price per unit, $41; total fixed expenses, $89,500; variable expenses per unit, $30. Assume that variable expenses are reduced by 20% per unit, and the total fixed expenses are increased by 10%. Total fixed expenses Contribution margin per unit = Target # of units Target profit 18,000 89,500