The formula to calculate the Counter Offer (CO) is:
\[ CO = O - (O \times D) \]
Where:
Let's say the original offer amount (O) is $1000 and the discount rate (D) is 0.15. Using the formula:
\[ CO = 1000 - (1000 \times 0.15) \]
We get:
\[ CO = 850 \]
So, the counter offer amount is $850.