Direction: Read the information carefully and answer the questions accordingly. 

The following information shows the data of two different books (Maths + Science) sold by four booksellers P, Q, R, and S.

Total number of books sold by seller P is 400. The number of Science books sold by seller P is 220. The ratio of number of Maths book sold by P to the number of Science book sold by seller Q is 3 : 5. Total number of books sold by seller Q is 500. Total number of books sold by seller R is 60% of the total number of books sold by seller Q. The ratio between the number of Maths and Science books sold by R is  8 : 7. Total number of Maths and Science books sold by all the seller is 800 and 1000 respectively.