Direction: Study the information carefully and answer the following questions.

In an electronics shop a total of 1650 calculators were sold in the month of January, February and March together. Ratio between the number of scientific calculators sold and the number of basic calculators sold is 1 ∶ 2. 30% of the calculators were sold in the month of February. In February ratio between the number of scientific calculators sold and the number of basic calculators sold is 3 ∶ 2. In March 27 more scientific calculators sold in March than that in January. Ratio between the number of basic calculators sold in February and that in March is 11 ∶ 25.