Answer:
1) Earl has two options:
sell at the beach
good weather results in $120 profit (60% chance = $72)
bad weather results in $10 profit (40% chance = $4)
sell at home
good weather results in $70 profit (60% chance = $42)
bad weather results in $40 profit (40% chance = $16)
the expected value of selling at the beach = $76
the expected value of selling at home = $58
2) Earl should go to the beach.