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.…