将以下话翻译成英文，谢谢

please find the quotation in attachment, and for showing our sincerity,we could accept your order 15-20k per year, but not less than 6k each time.

Please find attached file quotation, as a gesture of friendship and cooperation, shield the Secretary can accept 15-20K / year set the amount. But each order shall not be less than 6K.

Please find attached file quotation, as a gesture of friendship and cooperation, shield the Secretary can accept 15-20K / year set the amount. But each order shall not be less than 6K / year

Please search and collect attaches the files quotation, for the expression friendship and cooperation, shades the department to be possible to accept the 15-20K/year to subscribe the quantity. But each time the order form do not be lower than 6K.