SAT备考 - 每日一题（65）计算工资

【65】今天的题目很简单，计算工资。打零工时一定用得到。 Floyd is an aspiring music artist. He has a record contract that pays him a base rate of $200 a month and an additional $12 for each album that he sells. Last month he earned a total of $644. How many albums did Floyd sell last month? Floyd 是一位有理想的音乐家。他有一份合同，基本工资为每月 200 美元，另外，每售出一张专辑再额外获得 12 美元。上个月他总共赚了 644 美元。请问：上个月 Floyd 卖出了多少张专辑？