Can someone please help me answer this question asap? Thank you in advance

A sticky goo oozes mysteriously from the rare wazoo tree, which grows only on the farm of Wolf Molder, just outside of Pullman, Washington. This goo, when smeared on the face, results in a tightening of the skin and the elimination of fine lines. Wolf bottles the goo at a cost of $8 per bottle and sells it to Donna Scali at a wholesale price of $w per bottle. Donna sells the goo to the general public over the Internet under the name "Youth Goo" at a price of $P per bottle. The retail demand for Youth Goo is given by P = 80 - 0.1Q. Wolf offers Dana a two-part contract a wholesale price, w, and a fixed fee, T. Wolf will agree to charge a wholesale price w, which us lower than what he charges now, but will collect a fixed fee, $7, in return. What should be the range of the fee so that Donna would accept the offer and Wolf prefers this system? The fee should be choose your answer... V $ type your answer.. for Wolf to offer this contract to Donna in the first place, and it should be choose your answer... $ type your answer... for Donna to accept