ae Builder Products, Inc., uses the IFo method in its process costing system. t mama- factures a caulking compound that goes through three processing stages prior to completion. Infor mation 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 Pounds started into production during May- Pounds completed and transferred out pounds in process, May 3 1; materials 60% complete; 10,000 100,000 conversion 20% complete 15,000 Cost data: Work in process inventory, May 1 $1,500 $7,200 Materials cost.... Conversloh'cost Materils cost ro Cost added during May $154,500 $90,800 Conversion cost Require