[经] ratio of accounts payable to purchases

yīng fù zhàng kuǎn yǔ gòu huò bǐ lì ㄧㄥ ㄈㄨˋ ㄓㄤˋ ㄎㄨㄢˇ ㄩˇ ㄍㄡˋ ㄏㄨㄛˋ ㄅㄧˇ ㄌㄧˋ