I believe the signed contract was for 45,000 ton with tolerence of plus / minus 10%.
Theoretically, a min. of 40,500 ton and max of 49,500 ton.
First shipment - 10,000 ton+ second shipment 14,000 ton = 24,000 ton.
Third shipment will need to be min. of 16,500 ton to fulfill the contract.