翻译：根据我们和刘先生的约定费用将在发货后60天内结清

Based on the our agreement with Mr Liu, the fee will be settled within 60 days from the date of the shipment delivery.

The bill will be settled in 60 days after the merchandises are sent out according to the contract between Mr. Liu and us.

According to the date with Mr.Liu,the charge will be paid up after 60 days of delivery

According to the agreement we made with Mr. Liu, the fee will be payed 60 days after the shipment.

The payment will be released in 60 days after the delivery based on the agreement we've made with Mr.Liu.