If the project is only staffed with part-time workers. The estimated total costs of wages and benefits would be 5 employees will be needed to complete the project. If only 15 fult-time workers are assigned to the project, then part-time workers will be needed to complete the project. The total cost of wages and benefits for the is kulime worken and the part-time workers would be $ Employers' Hourly Costs for Full- and Part-Time Employee Benefits, December 2014