Hello Cornelius,
Thanks for your response. Yes, I understand that such questions may be out of scope for the PMP Exam. I was trying to learn more on PTA for my own interest and happened to catch these points in the formula study guide.
Q 31: the Target Cost is given as 1,000,000, Target Profit as 100,000 and Target Price as 1,200,000. Since the PTA formula doesn't use the Target Profit, the answer to the question is not an issue. But I thought, for the sake of correctness, the Target Profit should have been mentioned as 200,000, so that the formula (Target Price = Target Cost + Target Profit) held good.
Q 104: It asks for Target Cost and provides the values of Target Price and Target Profit. I would have calculated Target Cost by simply subtracting Target Profit from Target Price. That would have given me a different answer than what is derived in the guide:
Target Price = Target Cost + Target Profit
=> Target Cost = Target Price - Target Profit
=> Target Cost = 1,700,000 - 150,000
=> Target Cost = 1,550,000
The answer in the guide goes through the PTA formula and comes out with a Target Cost of 1,600,000.
In this question, the approach and the answer in the guide would make perfect sense to me had the value of Target Profit been omitted from the question.
So, I thought may be there are "special cases" where the Target Cost and Target Profit don't add up to Target Price. I want to clarify whether I'm thinking on the wrong lines or it's a minor typo in the guide.
Thanks !