Calculating Weighted-Average Cost Inventory Values. 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
March 1	Purchase	200	units	@	$40	per unit
June 1	Sold	120	units	@	$100	per unit
September 1	Purchase	100	units	@	$56	per unit
November 1	Sold	130	units	@	$100	per unit

2012
March 1	Purchase	100	units	@	$64	per unit
June 1	Sold	80	units	@	$120	per unit
September 1	Purchase	100	units	@	$72	per unit
November 1	Sold	100	units	@	$140	per unit

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

a. Weighted-Average Periodic. Do not round your cost per unit. Do not round until your final answer. Round your answers to the nearest whole number.

2011
Cost of goods sold	$Answer
Ending inventory	$Answer

2012
Cost of goods sold	$Answer
Ending inventory	$Answer

b. Weighted-Average Perpetual. Do not round your cost per unit. Do not round until your final answer. Round your answers to the nearest whole number.

2011
Cost of goods sold	$Answer
Ending inventory	$Answer

2012
Cost of goods sold	$Answer
Ending inventory	$Answer