Answer:
it will take you 2 1/2 months to gain 1000 euro
explaining:
okay so it took 3 months to gain 1200 and that divided by 3 (how many months) is 400 and when you take 1000 and divided it by 2.5 (the months) then you get 400 soooo after 2 1/2 months you should get 1000 euro