with the following information, how do i calculate gross profit rate under each of the following methods. (1) LIFO. (2) FIFO. (3) Average-cost?

You are provided with the following information for Sunland Inc. for the month ended June 30, 2020. Sunland uses the periodic method for inventory.

Date				Description		Quantity		Unit Cost or Selling Price
June		1		Beginning inventory		41		$ 40
June		4		Purchase		135		43
June		10		Sale		105		70
June		11		Sale return		17		70
June		18		Purchase		55		45
June		18		Purchase return		9		45
June		25		Sale		64		76
June		28		Purchase		35		49