amuntOf =(mathit⁡(NoOfDevelopers)×mathit⁡(AverageDevSalary)+mathit⁡(NoOfDesigners)×mathit⁡(AverageDesignSalary))×0.30 equals open paren mathit of open paren NoOfDevelopers close paren times mathit of open paren AverageDevSalary close paren plus mathit of open paren NoOfDesigners close paren times mathit of open paren AverageDesignSalary close paren close paren times 0.30