Sasha is a self-employed taxpayer. They recently spent $1,000 for airfare to travel to Italy. What amount of the airfare is deductible in each of the following alternative scenarios?
a) Sasha’s trip was entirely for personal purposes.
b) On the trip, Sasha spent eight days on personal activities and two days on business activities.
c) On the trip, Sasha spent seven days on business activities and three days on personal activities.
d) Sasha’s trip was entirely for business purposes.