It is observed that the sum of squares of the number of copies of FIRST and the number of copies of SECOND for each of the retailers is always equal to:

(2

^{2}+3

^{2})(3

^{2}+4

^{2})(4

^{2}+5

^{2}).

For example, if the respective number of copies of FIRST and SECOND titles possessed by any given retailer i are x

_{i}and y

_{i}, then :

x

_{i}

^{2}+y

_{i}

^{2}= (2

^{2}+3

^{2})(3

^{2}+4

^{2})(4

^{2}+5

^{2}); for all i = 1,2,....,n

How many retailers are there and how many copies of FIRST novel in total are available from all these (n) retailers?