Builder Products, Incorporated, uses the weighted-average method in its process costing system. It manufactures a caulking compound that goes through three processing stages prior to completion. Information on work in the first department, Cooking, is given below for May:

Production data:
Pounds in process, May 1; materials 100% complete; conversion 80% complete	10,000
Pounds started into production during May	100,000
Pounds completed and transferred out	?
Pounds in process, May 31; materials 60% complete; conversion 20% complete	15,000
Cost data:
Work in process inventory, May 1:
Materials cost	$ 1,500
Conversion cost	$ 7,200
Cost added during May:
Materials cost	$ 154,500
Conversion cost	$ 90,800

Required:

3. Compute the cost of ending work in process inventory for materials, conversion, and in total for May.

PLEASE EXPLAIN HOW YOU GET THE 9000 and 3000. Thanks).

		Materials Cost	Conversion Costs
	Pounds completed and transferred out	95,000	95,000
	Add: Pounds in process, May 31	9,000	3,000
	( Pounds x % Completion )	'=15,000*60%	'=15,000*20%
	Equivalent Units Of Production	104,000	98,000

Materials ( Equivalent Units x Unit Cost )	$13,500	'=9,000*1.5
	Add: Conversion ( Equivalent Units x Unit Cost )	$3,000	'=3,000*1
	Cost of ending work in process inventory	$16,500