Bill has just returned from a duck hunting trip. He brought home eight ducks. Bill$$s friend, John, disapproves of duck hunting, and to discourage Bill from further hunting, John presented him with the following cost estimate per duck:

Camper and equipment:

Cost, $$17,000$; usable for eight seasons; $14$ hunting trips per season $ $152$

Travel expense $($pickup truck$)$:

$100$ miles at $$0\mathrm{.}40$ per mile $($gas$,$ oil, and tires$$$$0\mathrm{.}24$ per mile; depreciation and insurance$$$$0\mathrm{.}16$ per mile$)40$

Shotgun shells $($two boxes per hunting trip$)40$

Boat:

Cost, $$2,320,$ usable for eight seasons; $14$ hunting trips per season $21$

Hunting license:

Cost, $$40$ for the season; $14$ hunting trips per season $3$

Money lost playing poker:

Loss, $$36($Bill plays poker every weekend whether he goes hunting or stays at home$)36$

Bottle of whiskey:

Cost, $$15$ per hunting trip $($used to ward off the cold$)15$

Total cost $ $307$

Cost per duck $($$$307-$: $8$ ducks$)$ $ $38$

Required:

$1.$ Assuming the duck hunting trip Bill has just completed is typical, what costs are relevant to a decision as to whether Bill should go duck hunting again this season?