Molly Malloy, a self-employed consultant, pays $700 for a plane fare to fly back and forth from a business location. She departs on Sunday, conducts business on Monday and Tuesday, visits friend in the local area on Wednesday and Thursday, and flies back to her home location on Friday. What part of the plane fare is a deductible business travel expense?

	none of the cost of the flight is deductible as a business travel expense
	2/3rds of the cost of the flight is deductible as a business travel expense
	all of the cost of the flight is deductible as a business travel expense
	only 1/3rd of the cost of the flight is deductible as a business travel expense