First of all, 1008 is a multiple of 9, so the number of two tour groups must be greater than 100, that is,1008/9 =112.

Secondly, 13 14 is neither a multiple of 13 nor a multiple of 1 1, so the number of the two tour groups is 1-50 and 51-kloc-respectively.

Then, 13-9=4 yuan, 1 1-9=2 yuan,1314-1008 = 306 yuan, assuming1-.

Finally, a=4 1 and b=7 1.