Identify all correct statements concerning payrolls and related payroll costs

a. Both employers and employees pay Social Security and Medicare taxes.

b. Workers' compensation premiums are withheld from employees' wages.

c. An employer's total payroll costs usually exceed total wages expense by about \(71 / 2\) percent.

d. Under current law, employers are required to pay Social Security taxes on employees' earnings, but they are not required to pay for health insurance.