TERMS ARE: NET 15 DAYS FROM DATE OF SHIPMENT, SUBJECT TO A SERVICE CHARGE OF 1-1/2% PER MONTH ON INVOICES NOT PAID WITHIN 30 DAYS OF DATE OF SHIPMENT. CREDIT PRIVILEGES ARE SUBJECT TO IMMEDIATE SUSPENSION OR REVOCATION IF ANY UNDISPUTED INVOICES ARE NOT PAID WITHIN 30 DAYS OF BILLING OR IF BALANCE DUE AT ANY TIME EXCEEDS VANCARGO DELIVERY'S APPROVED CREDIT LIMITS.