amount of contribution to capital

例句：

1. 1.The amount of money she earned is enough to buy a new car.
   她挣的钱足够买一辆新车。
2. 2. The company's annual report shows the amount of profits they made last year.
   公司的年报显示他们去年的利润数额。
3. 3. The amount of time spent on homework varies from student to student.
   花在家庭作业上的时间因人而异。