Builder Products, Inc., 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 90% complete 79,000 Pounds started into production during May 440,000 Pounds completed and transferred out ? Pounds in process, May 31; materials 75% complete; conversion 25% complete 39,000 Cost data: Work in process inventory, May 1: Materials cost $ 100,200 Conversion cost $ 12,100 Cost added during May: Materials cost $ 521,085 Conversion cost $ 66,260