Let S1,S2,S3,…,S10 respectively be the sum to 12 terms of 10 A.P.s whose first terms are 1, 2, 3, ..., 10 and the common differences are 1, 3, 5, ..., 19 respectively. Then ∑i=110Si is equal to
)
(a) 7380
(b) 7220
(c) 7360
(d) 7260