The Mann Corporation began operations in 2011. Information relating to the company's purchases of inventory and sales of products for 2011 and 2012 is presented below.

2011

February 1 Purchase 200 units @ $20 per unit

May 1 Sold 120 units @ $50 per unit

August 1 Purchase 100 units @ $28 per unit October 1 Sold 130 units @ $50 per unit

2012

February 1 Purchase 100 units @ $32 per unit May 1 Sold 80 units @ $60 per unit

August 1 Purchase 100 units @ $36 per unit October 1 Sold 100 units @ $70 per unit

Calculate the LIFO cost of goods sold and ending inventory for 2011 and 2012 assuming use of (a) the periodic method and (b) the perpetual method.