Measure words for Chinese currency

Complete the following conversation with proper Chinese measure words.

Gùkè: Lǎobǎn, píngguǒ duōshǎoqián yìjīn?
顾客:老板, 苹果      多少钱      一斤?
Customer: Boss, how much does 500-grams apples cost?

Láobǎn: Sì ____ qī _____ yìjīn.
老板: 四____ 七  _____ 一斤。
Boss: Four kuai, seven jiao per 500 grams.…