Price/performance ratio

This lesson explains the concept of cost performance index which is commonly referred as CPI. CPI...

CP 值直接翻成英文是cost performance ratio，但是這個詞其實是專業術語，不會用在日常生活中形容東西划算，千萬不要跟老外用這個詞來聊某東西很划算。

The Formula for the Cost Performance Index (CPI) ... If the ratio is less than one, there is a pr...