Discuss the appropriate HR techniques the company can use to forecast HR Supply and Demand with rationale

A retail giant such as Kroger or Randalls that has multiple locations offering a variety of products wants to do an HR Planning for its locations. Specifically, they are interested in deciding the HR Supply and HR Demand for each of the stores. Assume that the company has an internal labor market (that is, employees are hired as sales associates and then promoted to Supervisors, Assistant Manager, Department Manager, Store Manager, etc.,). Discuss the appropriate HR techniques the company can use to forecast HR Supply and Demand with rationale.