英语要怎么说，帮帮忙

From the date of the signing of the contract,you need prepaid 30 percent of deposit.
the producion of large goods has been finished . they only need to
pass inspection.Before Equipment cabinets ,you must clear all the remaining funds.

since the signature of pact,the thirty percent of payment is deposit,all of the products is finished,after testing,before shipment,the rest ammount must be paid off.

From the date of the signing of the contract, pre -
To pay 30 percent down payment.
All great finished goods production, the need to
To pass inspection, pre-paid counter installed
All of the remaining funds.