Give solution for this case,related to conflict and negotiations in organisational behaviour ( relate to organ

Three middle aged women working for a sales manager in a company handling all paper work. they are considered efficent and loyal. they rarely ociate with men in office denies taking lunches with them. because of increasing workload, company hired a girl aged 22 she was attractive, ociated and enjoyed the company of men. office efficiency appeared to increase, elder women resented jovial behaviour. they met president, stated it was impossible to work with new girl as she upset office morale and demanded she let go else all would quit.The president considered all three women to be competent and valuable employees,he also recieved report of the excellent work of new girl