To calculate the Discount Sales (DS):
\[ DS = OP - OP \times \frac{D}{100} \]
Where:
The discount sales price is the final price after applying a percentage discount to the original price of an item. It is calculated by subtracting the discount amount from the original price.
Given:
Using the formula:
\[ DS = 100 - 100 \times \frac{20}{100} = 100 - 20 = 80 \]
The discount sales price is $80.
Given:
Using the formula:
\[ DS = 50 - 50 \times \frac{10}{100} = 50 - 5 = 45 \]
The discount sales price is $45.