public void GivenMemberSalaryEntity_WhenCallGetGetMonthlyExpense_ShouldReturnValue(decimal amount, FrequencyIds frequencyId, decimal expectedResult)
        {
            // assign
            var memberExpensive = new MemberSalary
            {
                Amount         = amount,
                PayFrequencyId = (long)frequencyId
            };

            // act
            var result = memberExpensive.GetMonthlySalary();

            //  assert
            result.ShouldBe(expectedResult);
        }