Answer the following by referring to the presented data. The manager's

brother$-$in$-$law decided to make the patio set himself.

I checked the prices of the necessary materials at a material store. My

brother$-$in$-$law gave his brother$-$in$-$law, Dorilane's boss, a patio.

I asked if I could purchase the set at "cost price," and my brother$-$in$-$law agreed.

a$.$ Do you expect there to be a discrepancy in the price you think your

brother$-$in$-$law will pay?

The reason is that? How much do you think the price offered by the manager and

the brother$-$in$-$law will be$?$

b$.$ Since the factory's production capacity is operating at full capacity, the

manager receives the full normal price from his brother$-$in$-$law.

If it can be justified that it should be done, what is the corresponding cost

concept?