please help me! i dont understand this at all! I'm desperate! but please add the answer AND how you got the answer? thanks!

 59.73

Explanation:

The markdown of 80% is the amount of money you save

80% of 298.67 = 0.80*298.67 = 238.936 = 238.94

You save $238.94

So the amount you pay, ie the sale price, is 298.67-238.94 = 59.73 dollars.

Another approach:

If you save 80%, then you still pay the remaining 20%

20% of 298.67 = 0.20*298.67 = 59.734 = 59.73