enter the percentage with two decimal places

Management is getting excited about launching into the new market segment. However, they still have their head screwed on a little.....

They have asked you to let them know what the initial discount percentage should be in order to break even assuming that the initial sales will be 1,202 liters. For this, you have been given the following information:

• Fixed Cost = $8,012
• Variables costs = $12.97 per liter
• Anticipated sales price = $27.36

Calculate how many liters of Blue Goo must be sold to break even. (enter the percentage with two decimal places)

Break even = $8,012 ($27.36 - $12.97)

Break even = 556.78 liters its wrong answer

the answer is 28,23 %