Dad’s monthly salary is 1,500 yuan, and mother’s monthly salary is 2,000 yuan. The monthly expenses account for about 5/7 of father’s and mother’s salary. How much is left of father’s and mother’s monthly salary? ．
爸爸每月工资1500元，妈妈每月工资2000元，每月开支大约占爸爸和妈妈工资的(5/7)，爸爸和妈妈每月工资还剩多少？．
<result>100</result>