having trouble with question 1 and 2

Scenario Brad Winston is the owner and operator of Fishing Unlimited, a charter fishing business operated out of Oregon Inlet, NC. Brad has been taking groups of guests offshore to fish for tuna and marlin for over 15 years. He purchased his current fishing boat when he started the business, but now believes that a larger and better-outfitted vessel would allow him to increase the rate he charges per charter. Currently, he can carry a maximum of 6 guests while the larger boat will carry up to 8. The larger boat would also require him to take 2 deck hands on each outing, providing better service to his customers. Cost data for Brad's business is shown in the figure below. Figure 1 Fishing Unlimited Annual straight-line depreciation on boat $ 8,3001 ($175,000 original cost - $90,000 estimated resale value/20 years) Fuel Cost (per hour) $50 Insurance Premium (annual) $ 1,900 Maintenance and Repairs (annual) $ 3,500 Fishing Tackle and Gear (original cost) $ 7,000 Tackle and Bait (per guest) S 20 Deck Hand wages (per hour) $ 20 Dock Fees (annual) $ 2,400 Captain's License (annual) $ 200 Food and Beverages (per guest) $ 25 Professional Fees (per year) $ 750 Dock Utilities (annual) $ 1,200 Brad has someone interested in purchasing his existing boat for $80,000. He could use this cash as a deposit on the new boat which will cost him $225,000. His banker estimates the payments on the new boat will be about $1,500. The new boat is more fuel-efficient and he believes he can cut his fuel costs by 10% but the more expensive boat will increase his insurance premium by 12%. He is also concerned that he will have to change to a larger boat slip which would increase his dock fees by 5%. The good thing about the new boat is that he should save on maintenance and repairs, at least for the first 3 years. The only other expense Brad would incur with the new boat is adding some additional fishing tackle and gear to accommodate larger parties that he estimates would cost him about $1,500, His fees for both the old and the new boat are as follows: Old BoatNew Boat $ 550 $ 600 4 hours 6 hours $ 650 $ 700 Full Day (9 hours)$ 1,100 $ 1,200 Questions 1. Which costs are relevant to Brad's decision to purchase a new, larger boat? 2. If Brad decides to purchase a larger boat, what costs will be affected by this decision? Will they increase or decrease