There are two disccount applied to this computer, the first one is 30%. To calculate its value, we need to multiply the original price by the fraction that represents 30%

The first discount was 16,800. To determine the price after this, we need to subtract the listed price by the discount 1, this is done below:

Then we need to calculate the second discount, which was equal to 20%.

The final price is the subtraction between the price 2 and the discount 2, we have:

The final price is 31,360.