This document contains summaries of seminar notes on cost concepts and cost relationships for a manufacturing company. It discusses different types of costs like direct materials, direct labor, manufacturing overhead and their relationships. It also shows income statements and treatment of beginning and ending work-in-process and finished goods inventory. Concepts around fixed, variable and mixed costs are explained along with methods to separate mixed costs. An example is given to illustrate treatment of mixed utility costs. Finally, conventional product costing method and use of predetermined overhead rates is summarized.