Materials such as wood and screws can be classified as OA. Period cost B. Product (direct) cost OC. Product (indirect) cost OD. Period + Product (direct) cost OE. Period Product (indirect) cost Clear my choice Security system cost is classified as O A. Fixed cost (F) OB. Variable cost (V) O C. Semi-variable (SV) OD. Semi-fixed cost (SF) Previous page Water and electricity (80% of cost is incurred by the factory) can be classified as eader is needed to supervise 10 labourers (11-20 labourers require two team leaders, etc.) can be classified as OA. Period cost B. Product (direct) cost Product (direct) cost OC. Product (indirect) cost OD. Period + Product (direct) cost E. Period + Product (indirect) cost Salary for the General manager (time allocation: 50% for supervision of production, 30% for financial management, 20% for marketing and sales activities). This can be classified as OA. Period cost OB. Product (direct) cost OC. Product (indirect) cost OD. Period + Product (direct) cost OE. Period + Product (indirect) cost