[经] cost-plus percentage fee contract

chéng běn jiā dìng bǐ fèi yòng hé tóng ㄔㄥˊ ㄅㄣˇ ㄐㄧㄚ ㄉㄧㄥˋ ㄅㄧˇ ㄈㄟˋ ㄩㄥˋ ㄏㄜˊ ㄊㄨㄥˊ