The research department of the COLLEGE STUDENT EXPRESS Airline has estimated the income elasticity of demand for its overseas flights to be 4. Further, most economic forecasts predict a 2% increase in incomes for students during the upcoming year. If among the college students that flew last year, 100,000 had chosen the COLLEGE STUDENT EXPRESS, and if the company usually needs one flight attendant for every 1000 passengers, estimate the number of additional flight attendants the company should be hiring in the upcoming year.