求翻译：本合同生效后的3个工作日内，由甲方向乙方出具总费用发票。乙方在收到发票后的7个工作日内向甲方支付发票总额60%的费用款项；其余40%的费用款项由乙方在收到报告后的7个工作日内向甲方一次性付清。是什么意思？

After the effective date of this contract within 3 working days, issued by the Party A to Party B the total cost of invoice. B in the receipt of the invoice within 7 working days after Party A to pay 60% of the total cost of the invoice amount; the remaining 40% of the cost of funds by the Party in

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In after this contract activation 3 working days, write up the total expense receipt by the party of the first part to the second party.The second party after receives the receipt 7 working day introverted the parties of the first part pay the receipt total amount 60% expense fund; Other 40% expense

Within 3 working days after the entry into force of this contract, issued by party a to party b invoice the total cost. B within 7 working days after receipt of the invoice party pay for the invoices the total amount of 60% sum; the rest 40% fee payments by str within 7 working days after receipt of