A seller of competitive books in Mukherjee Nagar, bought 6 sets of books for Rs. 1800 per set having 5 books in each set and marked each at same price. He sold 3 sets such that in each set he sold 3 books at 10% discount and 2 books at 5% discount. In the remaining 3 sets he sold all the books at 5% discount. Find the marked price of one book, if the total profit he made on his sales is Rs. 700.5.