Answer:
Maria earned €600 each week, and she spent 1/4 of her money on food.
So, Maria spent:
(1/4) * €600 = €150 on food each week.
To find how much she earned in 4 weeks, we can simply multiply her weekly earnings by 4:
€600/week * 4 weeks = €2400
Therefore, Maria earned €2400 in 4 weeks.