Final price would be (.5)(.8)(320) or
$128
$128
0.8 * 160 = $128
50% is half, so the desk is reduced by half. That one's easy.
20% is 20/100 = 1/5, so you need to find 1/5 of the reduced price of the desk you worked out above, and subtract that from the reduced price.
Is that enough?
First, we calculate the discount when the store takes 50% off the retail price of the desk.
50% of $320 = (50/100) * $320 = $160
Therefore, the desk is discounted by $160 during this step.
Next, we apply an additional 20% off for the holiday sale.
20% of $320 = (20/100) * $320 = $64
Therefore, the desk is discounted by $64 during this step.
To calculate the final price, we subtract the total discount from the retail price.
Final price = $320 - ($160 + $64)
Final price = $320 - $224
Final price = $96
Therefore, the desk is on sale for $96 during the holiday sale.