4. Condition of Payment
The Hospital will not bill any services fee direct to the employees and guests of the Company so that the Company shall make payment of the Service Fee to the Hospital in a lump sump based upon the calculation mentioned in Clause 3, as stated in the monthly invoice issued by the Hospital within the fifth day of following month. Such payments of the Service Fee shall be made to the Hospital within 30 days from the date of receipt of the invoice from the Hospital.