Ayayai Corp. just began business and made the following four inventory purchases in June:

June 1		141 units		$980
June 10		188 units		1470
June 15		188 units		1580
June 28		141 units		1240
				$5270

A physical count of merchandise inventory (rounded to whole dollar) on June 30 reveals that there are 200 units on hand. The inventory method which results in the highest gross profit for June is

the average cost method.

the LIFO method.

not determinable.

the FIFO method.