一段商务信函英文

You want to know that we spent a few days time communication with the Finance Department to distinguish between the two shipments payment period.
(From a period of invoices and payments, 90 days, B and invoices on 60 days.)

If you from unauthorized changes to a ship date of the invoice for the night 30 days and b unanimously with the 60 days without prior communication with us, we will continue in accordance with the Finance Department from a period of invoices and payments, 90 days, B and invoices on 60 days the payment date.

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……权威翻译……

You want to know that we spent a few days time communication with the Finance Department to distinguish between the two shipments payment period.
(From a period of invoices and payments, 90 days, B and invoices on 60 days.)

If you from unauthorized changes to a ship date of the invoice for the night 30 days and b unanimously with the 60 days without prior communication with us, we will continue in accordance with the Finance Department from a period of invoices and payments, 90 days, B and invoices on 60 days the payment date.

You must know we have spend several days and the finance departmentlink up the payment time which an area minute two place produces goods
(From a payment time receipt date 90 days, B receipt date 60 days.)

If you arbitrarily change the receipt date which produces goods from afor is late 30 days with b identically with is 60 days, but notbeforehand links up with us, our finance department still will deferto from a payment time receipt date 90 days, the B receipt date 60days calculates the date of payment

Asks respectfully the processing reply opinion