Prime cost will only be calculated when we add Direct Material+ Direct Labour+ Direct Expenses. Direct labour is one of the important element of cost
Most probably R&D and other functional projects which are basically formed during the strategic implementation.
Its the rate which the income is low below the poor lane of the present earning income.
Understanding the planning function - Understanding the organizing function - Understanding the Directing Function - Understanding the Control mechanisms - Understanding the evaluation procedure - Understanding the reporting procedure - Vision and principles of Integrated Information management system - Architecture of Information management system - Proper research and documentation of the above 6 functions