个人所得税 根据税后计算税前工资的excel公式?

=ROUND来自(MAX((C1-起征点-25*{0,0,1,5,15,55,135,255,415,615})/(1-0.05*{0,1,油收列树学权拉收未受已2,3,4,5,6,7,8,9}))+起征点,2)